Facial Roller Guide: Jade, Rose Quartz, Steel and What Actually Works

A facial roller is a $12 impulse buy that promises a $400 facial. The math rarely works out the way the packaging suggests. That does not make the tool useless. It makes most of the claims around it inflated, and the actual function — moving fluid, cooling skin, forcing you to slow down for three minutes — worth understanding before you hand over money.

This guide covers the entire US market: jade, rose quartz, amethyst, stainless steel, ice rollers, vibrating rollers, cheap Amazon sets and $85 cryo tools. It also covers the parts most buying guides skip. What the dermatology literature actually says. How to spot dyed glass sold as "real jade." Which retailers let you return a used beauty tool, and which ones will politely tell you to keep it. And why "free shipping" on a $30 roller is not free at all.

If you want the short version: buy a smooth stainless steel or ice roller if puffiness is your problem. Buy jade or rose quartz if you want a pleasant ritual and a cool stone on your face. Do not buy either expecting collagen production, permanent lifting or wrinkle removal. The evidence is not there.

What a facial roller actually is — and what it is not

A facial roller is a hand-held massage tool with one or two rolling heads mounted on a handle. The large head is for cheeks, jaw and forehead. The small head is for the under-eye area and the sides of the nose. You roll it across lubricated skin in upward and outward strokes, usually for two to five minutes.

The mechanism is mechanical, not chemical. Rolling applies gentle, directional pressure that pushes interstitial fluid toward the lymphatic drainage points near the ears and down the neck. It also raises local blood flow and cools the surface of the skin if the tool has been refrigerated. Those effects are real. They are also temporary, usually measured in hours rather than weeks.

The category has a long history and a short evidence base. Jade rollers were used in Chinese beauty practice for centuries and became a mainstream US beauty tool in the 1970s. The modern version arrived through K-beauty and TikTok, which is why the shelf now includes obsidian, amethyst, germanium and a small army of battery-powered rollers with names that sound like fitness equipment.

Here is the distinction that matters. A facial roller is a massage tool. A derma roller is a microneedling device covered in tiny needles that punctures the skin. They are sold in the same aisle and sometimes described with the same words. Treating a derma roller like a face massager is the most common misuse in this category, and it is a good way to give yourself irritation or an infection.

What a facial roller is not: a face-lift, a collagen stimulator, a treatment for rosacea or eczema, or a weight-loss tool for your cheeks. UPMC's dermatology team is blunt about this. There is no evidence that jade rollers or any other facial roller have healing or anti-aging properties, and they will not cure a skin condition. A chilled roller can make under-eye bags look less dramatic for a few hours. It cannot change the anatomy underneath.

Every type of facial roller sold in the US

The US market splits into six practical categories: stone and crystal rollers, metal rollers, ice and cryo rollers, silicone and mini eye rollers, textured and sculpting rollers, and powered rollers. The material affects weight, grip, temperature retention and how easy the tool is to clean. It does not change the basic massage mechanism.

Jade rollers

Jade is the classic. It is softer and more porous than most roller stones, with a slightly grippier surface that gives a controlled, contouring feel. It cools quickly in the fridge, usually costs less than rose quartz, and carries a much higher risk of chips and cracks if you drop it or freeze it.

Porosity is the real trade-off. A porous stone can harbour bacteria if you skip cleaning, and many budget "jade" rollers are not jade at all. Two genuine jades exist, nephrite and jadeite. Plenty of inexpensive rollers are dyed marble, glass or resin, none of which are nephrite or jadeite and some of which can irritate skin.

Jade is the right choice if you want a traditional-feeling tool, you like a bit of grip against the skin, and you are buying from a retailer that certifies the stone. It is the wrong choice if you want maximum cooling or you are rough on your belongings.

Rose quartz rollers

Rose quartz is denser and smoother than jade. It glides with less drag, which makes it better for longer sessions over serum or facial oil. It also holds its temperature a little longer out of the fridge, although the difference is smaller than the marketing suggests and sources disagree on how meaningful it is.

The functional difference between jade and rose quartz for the skin is essentially zero. The skin cannot distinguish between stone types. What changes is the user experience: rose quartz feels smoother, jade feels grippier, and both deliver the same cooling massage.

Rose quartz is the safer pick for sensitive skin and for anyone who plans to roll over a slippery layer of product. It is also the material most often faked with dyed glass, so buy from a brand that publishes stone certification rather than a marketplace listing with a stock photo and a 4.7-star average.

Stainless steel and metal rollers

Stainless steel conducts temperature more effectively than stone. It gets colder faster in the refrigerator and delivers a more intense cooling sensation, which is the part that actually helps with puffiness. It is also non-porous, easy to sanitize, and will not chip or develop microscopic cracks. A dropped steel roller survives. A dropped jade roller becomes two jade rollers.

Metal rollers are the pragmatic choice for morning depuffing, travel and anyone who has broken a stone tool before. The trade-off is weight and a less "ritual" feel. Some people find the cold of steel too intense around the eyes, especially if the roller has been in the freezer rather than the fridge.

The metal category also includes zinc alloy and gold-plated handles. Gold plating is cosmetic. It does not add a skin benefit, and it wears off. Judge the roller head, not the handle finish.

Ice and cryo rollers

Ice rollers are the most honest product in the category because they do not pretend to be anything other than cold therapy. The head is usually stainless steel or a freezer-safe plastic shell filled with gel. You chill it, roll it over your face, and get a short-term reduction in puffiness, redness and the look of pores.

The cooling effect works through vasoconstriction: cold narrows blood vessels, which reduces swelling and redness, especially around the eyes where fluid collects overnight. That is a physical response, not a crystal-energy response. A $13 ice roller and an $85 cryo roller use the same principle. The expensive one usually has better temperature retention, a smoother rolling action and a more comfortable handle.

Silicone ice rollers are a subcategory. They are softer, cheaper, and often designed for the freezer. They feel pleasant on inflamed skin but deliver less consistent cold than steel because silicone insulates. For post-workout redness or a hot flash, they are fine. For serious morning puffiness, steel wins.

Amethyst, obsidian, marble, glass, gold and white jade

Amethyst and obsidian are the premium crystal options. Obsidian is denser and heavier, with a glassy smooth surface. Amethyst sits between jade and quartz in hardness. Both are marketed with metaphysical language that has no dermatological support. They work as massage tools, not as energy medicine.

Marble and glass rollers are usually budget items. Glass is non-porous and easy to clean, but it chips, and a chipped edge on a face tool is a bad idea. Marble can be smooth and heavy, but inexpensive marble is often dyed or reconstituted. White jade is a colour variant, not a separate benefit. Pink rollers are usually rose quartz or dyed glass, and the colour tells you nothing about performance.

Gold rollers are a finish, not a material category. A gold-plated handle on a stainless steel head is a stainless steel roller with a markup. Buy it if you like how it looks. Do not pay extra for the gold on the assumption that it does something to your skin.

Vibrating, electric, 3D, ball and silicone rollers

Vibrating and electric rollers add powered massage to the rolling motion. The vibration may help relax facial muscles and improve the sensory experience, but it does not build collagen. A vibrating roller is a massage device with a motor, and the motor is another thing that can break or need charging.

3D rollers and ball rollers change the shape of the head rather than the material. A 3D roller has a contoured head designed to fit the jaw or cheekbone. A ball roller uses a spherical head for targeted pressure. These are ergonomic variations. They can be genuinely more comfortable on the jawline, but they are not a different treatment.

Silicone rollers are usually ice rollers or mini eye rollers. They are soft, cheap and gentle, which makes them a reasonable first tool for someone who finds steel too cold. The trade-off is less precise pressure and shorter cold retention.

Jade vs rose quartz vs stainless steel: the material question

This is the decision most buyers actually face, and most of the internet answers it badly. The honest answer is that the stone does not change the skin outcome. The material changes temperature behaviour, grip, durability and cleaning, and those are the things you should use to choose.

Jade is the grippier, cheaper, more fragile option. Rose quartz is the smoother, denser, slightly more expensive option. Stainless steel is the coldest, most durable and most hygienic option. None of them "detoxify" you, and none of them have a mineral that your skin can absorb through a polished surface.

The price overlap is the interesting part. A $32 jade roller and a $13 stainless steel ice roller do the same job, and the steel one is better at the job most people actually buy a roller for. The jade roller wins on feel and tradition. That is a legitimate reason to buy something, as long as you are honest that it is the reason.

One more variable that rarely gets mentioned: roller weight. A heavier head gives you more consistent pressure with less effort. Cheap hollow plastic rollers feel weightless and require you to press harder, which is exactly how people irritate their skin. If you are choosing between two rollers at the same price, pick the heavier one.

Do facial rollers work? The evidence, separated from the marketing

Yes, in a narrow sense. No, in the sense the packaging implies. The split is clean enough that you can hold both ideas at once without being a cynic or a sucker.

Puffiness and lymphatic drainage

Facial rolling temporarily reduces puffiness by moving fluid and boosting local circulation. That effect is real, measurable and short-lived. It usually lasts somewhere between 30 minutes and a few hours, and it resets every time you sleep, eat a salty meal or cry.

The direction matters more than the tool. You roll outward and upward across the face, then downward along the sides of the neck toward the collarbone, which is where lymph drains. If you roll downward on your cheeks, you are pushing fluid the wrong way. A $200 roller used in the wrong direction performs worse than a $13 roller used correctly.

Cold amplifies the effect. A chilled roller constricts blood vessels and reduces swelling around the eyes, which is why ice rollers are the most reliable depuffing tool in the category. If you only care about looking less puffy in the morning, buy the cheapest stainless steel ice roller you can find and put it in the fridge, not the freezer.

Wrinkles, collagen and "lifting"

A 2025 comparative study found that both gua sha and facial rollers improved skin elasticity, tone and contour after eight weeks of use. That is a more encouraging result than the older "no evidence" line, and it deserves to be mentioned. It is also a small, short study, and "improved elasticity" is not the same as "erased wrinkles."

Older laboratory work on mechanical massage found increased elastic fibre production in skin samples, which is where a lot of the collagen claims come from. Lab samples are not faces. The leap from "mechanical massage increased elastic fibres in a skin explant" to "this roller will lift your jawline" is a marketing leap, not a scientific one.

What the evidence does not support: permanent lifting, fat loss in the face, bone reshaping, or long-term wrinkle reduction from rolling alone. A roller cannot delete a deep wrinkle any more than a massage can change the shape of your cheekbone. If a brand promises a non-surgical face-lift, you are paying for the promise, not the physics.

Product absorption

Rolling can help spread serum or oil more evenly and may improve the feel of product penetration by increasing surface blood flow. It does not push active ingredients through the skin barrier in any meaningful way. The roller is a spreading and massage tool. The serum is doing the ingredient work.

This is why the "apply serum first" instruction matters. A roller dragged across dry skin creates friction, tugs the skin and defeats the purpose. You want slip. A cheap fragrance-free moisturizer or a few drops of facial oil is enough. You do not need a $90 serum to make a $30 roller work.

What a roller cannot do

It cannot slim your face. It cannot cure rosacea, eczema or acne. It cannot replace sunscreen, retinoids or in-office treatments. It cannot permanently change your jawline. And it cannot sterilize itself. If you use a dirty roller on clean skin, you are introducing bacteria, which is worse than doing nothing.

The realistic promise is modest and worth having: a two-to-five-minute ritual that reduces morning puffiness, makes skin feel cooler and smoother, and gives you a reason to stop scrolling and pay attention to your face. That is not nothing. It is just not a face-lift.

How to use a facial roller, including lymphatic drainage directions

Technique is the difference between a tool that does something and a tool that scratches at your face for three minutes. The sequence below is the standard esthetician approach: cleanse, lubricate, roll outward and upward, finish down the neck.

Step-by-step technique

Start with a clean face and a clean roller. Apply a serum, moisturizer or facial oil so the tool glides without dragging. If the skin tugs, you need more slip, not more pressure.

Use the large roller on the forehead, cheeks, jaw and neck. Use the small roller around the eyes and along the sides of the nose. Work in gentle strokes, three to five passes per zone, with light pressure. The roller should feel like it is floating over the skin, not pressing into it.

Finish by rolling down the sides of the neck toward the collarbone. This is the drainage step, and it is the one most people skip. Rolling the face without clearing the neck is like sweeping a floor without opening the door.

Lymphatic drainage directions

Forehead: roll from the centre outward toward the temples, then down toward the ears. Cheeks: roll from the nose outward toward the ear, then down the side of the face. Jaw: roll from the chin outward toward the ear. Under eyes: roll from the inner corner outward toward the temple, using the small head and almost no pressure. Neck: roll downward from the jawline to the collarbone.

The consistent logic is outward and down toward the drainage points, never aggressively downward on the face itself. Some guides say "upward and outward" for the face and "downward" for the neck. Both are describing the same route: fluid leaves the face at the perimeter and exits through the neck.

Frequency and timing

Once a day is enough. Morning is the most useful slot because that is when puffiness is worst. A chilled roller for three to five minutes before skincare or makeup gives the most visible return. Evening use is more about relaxation and product spreading than depuffing.

Do not roll over active breakouts, open skin, a fresh chemical peel or a sunburn. Do not roll hard enough to bruise. If your skin is red after you finish, you used too much pressure. The goal is a slight glow, not a crime scene.

Five mistakes that make rollers useless

• Rolling on dry skin, which creates drag and tugs the skin.
• Rolling downward on the cheeks instead of outward and up.
• Using a dirty roller, which transfers bacteria and can worsen acne.
• Freezing a stone roller, which can crack it; refrigerate instead.
• Expecting permanence from a temporary fluid movement.

The fifth mistake is the expensive one. A roller is a maintenance tool, not a treatment. If you stop using it, the puffiness comes back. That is not a defect. That is what a massage does.

Best facial rollers in the US: eight picks that earn their shelf space

This is not a list of the eight most expensive rollers. It is a list organised by job: best stone roller, best rose quartz, best budget cooling, best premium cryo, best vibrating, best budget jade, best set and best serious depuffer. Prices move, so treat the numbers as a snapshot of the US market rather than a permanent promise.

1. Mount Lai The Jade Roller — best overall stone roller

Mount Lai is the benchmark for a reason. The jade is certified, the frame is well balanced, and the roller spins without wobbling. It costs more than a marketplace no-name, and you are paying for stone verification and build quality rather than a magic mineral.

The jade surface has enough grip for jaw and cheek work, which is where a lot of cheap rollers feel slippery and useless. The trade-off is fragility. Drop it on tile and you will learn why stone rollers have a short lifespan in clumsy households.

Buy this if you want a traditional jade roller that will not feel like a toy. Skip it if your main goal is depuffing, because a $13 steel ice roller will do that job better for less.

2. Herbivore Rose Quartz Roller — best rose quartz

Herbivore certifies its rose quartz, which matters in a category full of dyed glass. The dual-ended design covers cheeks and forehead with the large head and under-eyes with the small one. The stone stays naturally cool and glides smoothly over serum.

The handle can loosen with heavy use, which is the most common complaint. It is still one of the better rose quartz options in the US because the stone is real and the rolling action is smooth. At around $35, it sits in the middle of the market.

This is the pick for someone who wants a rose quartz ritual and is willing to pay a small premium for certified stone. It is not the pick for someone who wants maximum cold.

3. ESARORA Ice Roller — best budget depuffer

The ESARORA is the value pick that keeps showing up in expert roundups because it does the one thing rollers are actually good at: cold therapy. The stainless steel head stays cold, the roller is simple, and it costs about $13.

It is not pretty. The handle is basic, the build is light, and it will not feel like a spa object. It will, however, reduce morning puffiness for the price of two coffees. If you are buying your first roller and you are not sure you will stick with it, start here.

4. StackedSkincare Ice Roller — best premium cryo

Vogue's pick for best overall ice roller, the StackedSkincare tool costs around $85 and delivers a more controlled, longer-lasting cold than budget steel. The head is smooth, the handle is comfortable, and the temperature retention is the reason to pay more.

Is it eight times better than the ESARORA? No. It is better in the ways that matter at the margins: less condensation on the handle, more consistent cold, a nicer rolling feel. If you use an ice roller every morning and you want the best version of the tool, this is it. If you use it twice a month, save the money.

5. Nurse Jamie Uplift — best vibrating and textured option

The Nurse Jamie Uplift is the most "device-like" tool on this list. It uses tourmaline stones in a rolling frame and adds a rhythmic, vibrating action that is closer to a facial massage than a simple stone roller. It costs around $69.

The vibration is pleasant and may help relax jaw tension. It does not build collagen, and the price reflects the motor and the brand more than a clinical advantage. If you want a powered massage tool and you like the rolling format, it is a solid choice. If you want stone-on-skin simplicity, it is overbuilt.

6. Skin Gym Jade Facial Roller — best budget jade

Skin Gym has been making jade rollers for years and has the balance between weight and manoeuvrability figured out. At around $32, it is cheaper than Mount Lai and still feels like a real tool rather than a souvenir.

The jade quality is not certified to the same standard, so you are taking a slightly bigger authenticity risk. Buy from a reputable retailer rather than a marketplace listing, and check the stone when it arrives. If it feels room-temperature and suspiciously perfect, it may not be jade.

7. BAIMEI Jade Roller & Gua Sha Set — best budget set

BAIMEI sells the roller-plus-gua-sha combination at a budget price, which makes it the default first purchase for a lot of US shoppers. The set is widely reviewed and widely available, and it includes both tools for less than the cost of a mid-range roller alone.

The quality is inconsistent across batches, which is the risk of the budget tier. If you get a good one, it is excellent value. If the roller wobbles or the stone feels warm to the touch, return it. At this price, the return is the quality-control step.

8. CurrentBody Skin Cryo Roller — best for serious puffiness

CurrentBody's cryo roller is a stainless steel tool built around cold delivery, with a smooth head and a design that stays cold long enough to finish a full face and neck routine. It sits at the premium end and is aimed at people who treat depuffing as a daily non-negotiable.

If you already own a budget ice roller and you use it every morning, this is a reasonable upgrade. If you are new to rollers, it is an expensive place to start for a temporary effect.

Facial roller prices and the real cost per use

The sticker price is not the cost. The cost is the price divided by the number of times you actually use the thing before it breaks, gets lost or ends up in a drawer. That calculation changes the ranking.

The arithmetic uses 365 uses for daily and 104 uses for twice weekly. It ignores breakage, which is the biggest hidden cost in the stone category. A jade roller that chips after four months has a much higher real cost per use than the table suggests. A stainless steel roller that survives three years keeps dividing down.

There is a second hidden cost: shipping and returns. A $13 roller with $6 return shipping costs you 46% of the purchase price to send back if you dislike it. A $38 roller with free returns is cheaper to try than a $13 roller with paid returns, even though the sticker price is higher. This is the kind of math that "free shipping" marketing is designed to make you skip.

And the free-shipping threshold is not a gift. If a retailer offers free shipping over $50 and the roller costs $32, you are being nudged to add $18 of product you did not plan to buy. The shipping was never free. It was bundled into a larger basket. Internet shops are businesses with margins, not charities with warehouses.

How to spot a fake jade or rose quartz roller

The US market is full of rollers that are sold as jade or rose quartz and are actually dyed glass, marble, resin or reconstituted stone. Some are harmless. Some can irritate skin, especially if the dye is poorly fixed or the surface develops micro-cracks that harbour bacteria.

Temperature is the simplest test. Real stone stays cool to the touch at room temperature. Glass and plastic equilibrate to room temperature quickly. If the roller feels warm and light, it is probably not stone. If it feels cold and heavy, you are on the right track.

Look for imperfections. Real jade and rose quartz have tiny veins, cloudiness, colour variation and internal character. A roller that is perfectly uniform, neon-perfect pink or flawless green is suspicious. Nature does not mass-produce identical stones.

Sound helps. Real jade gives a clear, crisp chime when tapped gently. Glass or plastic sounds dull. The price is another signal: a "certified jade" roller for $6 is not certified jade. It is a $6 object with a label.

Buy from retailers that publish stone certification and have a return policy. If the listing has no brand, no certification and no return address, you are not buying a beauty tool. You are buying a lottery ticket with a handle.

Cleaning a facial roller without wrecking it

Clean the roller before and after every use. Wipe the head with a damp cloth and a mild soap or facial cleanser, then dry it fully. Stone rollers are porous to varying degrees, and moisture left in a crack or around the axle is an invitation for bacteria and mould.

Once a week, give it a deeper clean with gentle soap and water, and let it air-dry on a clean towel. Do not soak a stone roller for hours, do not put it in the dishwasher, and do not use hot water. Heat and sudden temperature changes can crack stone.

Stainless steel is easier. Wipe with soap and water, dry it, and you are done. You can use a beauty-tool sanitizing spray if you like, but soap and water are enough for a non-porous surface. The roller is not a surgical instrument. It just needs to be clean.

Store it somewhere dry, not in a damp bathroom drawer. If you chill it, put it in the refrigerator rather than the freezer. Freezing a stone roller can crack it, and a cracked roller is a skin-irritation device with a nice handle.

Buying a facial roller in the US: returns, warranty and consumer protection

The US has no federal law requiring a retailer to accept a change-of-mind return. Return rights are set by the store's policy and, in some states, by state disclosure rules. The FTC's Cooling-Off Rule sounds like a safety net, but it generally covers certain sales made away from a seller's regular place of business, not a normal checkout on a retailer's website.

That means the return policy on the product page is the contract. Sephora accepts new or gently used products within 30 days for a full refund in most cases, and offers store credit from day 31 to 60. Ulta's window is 30 days for a refund to the original payment method and 31 to 60 days for merchandise credit, and beauty tools follow the standard policy. Amazon's window is typically 30 days, but the seller and the category can change the terms.

Read the beauty-tool exclusion before you buy. Some retailers treat opened tools as final sale for hygiene reasons. Some accept gently used tools but only for store credit. Some require original packaging. A roller is a low-price item, so the return shipping cost can eat a large share of the refund, which is why the free-return retailers are worth a small price premium.

If a marketplace seller sends you a fake or a damaged roller and refuses a return, your fallback is a credit-card chargeback for goods not as described. That is a slow process, and it works better with photos, the listing description and the certification claim saved before you open a dispute. Keep the packaging until you are sure the stone is real.

Warranty is largely irrelevant in this category. Most rollers have a 30-day to one-year warranty at best, and the failure modes — chips, loose axles, cracked stone — are usually treated as user damage. The effective warranty is the return window. Buy accordingly.

Who should buy a facial roller — and who should skip it

Buy one if you wake up puffy, you enjoy a short manual ritual, you want to spread serum more evenly, or you need a gentle cooling tool for sensitive skin. A stainless steel ice roller is the most useful version for the largest number of people. A jade or rose quartz roller is the most pleasant version if you like the feel of stone.

Skip it if you expect permanent lifting, collagen production, wrinkle removal or a replacement for sunscreen and retinoids. Skip it if you have active breakouts, open skin or a skin condition that flares with friction, unless a clinician says otherwise. Skip the $85 cryo roller if you know you will use it twice and forget it.

Skip the derma roller entirely unless you have researched microneedling and know what you are doing. It is a different category with different risks. A facial roller is a massage tool. A derma roller is a wounding tool. The words are similar. The consequences are not.

The pragmatic purchase is a cheap stainless steel ice roller for mornings and, if you want the ritual, a certified jade or rose quartz roller for evenings. That is two tools for less than the price of one premium cryo roller, and it covers both jobs better than a single compromise purchase.

What is a facial roller used for?

A facial roller is used for gentle facial massage: it temporarily reduces puffiness, boosts surface circulation, spreads serum or oil, and gives a cooling sensation. It is not a treatment for wrinkles, acne or rosacea, and it does not permanently change facial structure.

Do facial rollers really work?

They work for short-term depuffing and relaxation, and a 2025 study found improved skin elasticity, tone and contour after eight weeks of use. They do not erase wrinkles, build collagen permanently or replace in-office treatments. The effect is real but temporary.

What is the best facial roller for lymphatic drainage?

A smooth stainless steel roller with a chilled head is the most effective for lymphatic drainage because cold enhances vasoconstriction and the non-porous surface is easy to keep clean. Technique matters more than brand: roll outward and upward on the face, then down the neck toward the collarbone.

How do you use a facial roller for puffiness?

Cleanse, apply a serum or moisturizer for slip, and roll outward and upward across the forehead, cheeks and jaw. Use the small head around the eyes, then roll down the sides of the neck toward the collarbone. Three to five gentle passes per zone, for three to five minutes.

Jade roller or rose quartz roller: which is better?

Neither is better for your skin. Jade is grippier, cheaper and more fragile. Rose quartz is smoother, denser and slightly more expensive. The skin cannot tell the difference. Choose based on feel, budget and how carefully you handle fragile objects.

How often should you clean a facial roller?

Wipe it before and after every use with a damp cloth and mild soap, and dry it fully. Do a deeper clean once a week. Stone rollers are porous, so moisture left around the axle or in cracks can harbour bacteria. Stainless steel is easier to sanitize.