How to Prevent Clothes From Shrinking: Wash, Dry, Store

To keep clothes from shrinking, wash them in cold water on a gentle cycle, keep heat away from them in the dryer (or skip the dryer), and follow the care label on anything made of cotton, wool, linen, rayon or viscose. Heat, water and agitation are what shrink fabric, so every habit below cuts down one of the three. Most of the damage happens in the first wash, which is why new clothes deserve the most careful treatment.

TL;DR

• Heat, moisture and tumbling together cause shrinkage. Reduce all three: cold water, a gentle cycle, low heat or air drying.
• Cotton, wool, linen, silk, rayon and viscose shrink most. Polyester, nylon and spandex shrink least.
• A cotton blend with 50% cotton or more should be treated like cotton, so an 80% cotton, 20% polyester tee is still shrink-prone.
• Read the care label before the first wash. About 90% of cotton’s eventual shrinkage shows up in the first wash-and-dry cycle.
• Hand wash or air dry anything you cannot afford to lose. Dry clean only labels mean what they say.

Table of Contents

• Why clothes shrink in the first place
• Which fabrics shrink and which barely move
• Before you wash: read the label
• How to wash without shrinking
• How to dry without shrinking
• What about the 30-minute laundry rule?
• A routine you can follow every time
• Perspective: why a pre-measured sheet suits a gentle routine
• Make the cold, gentle wash easy
• Common mistakes that cause shrinking
• FAQ
• Sources

Why clothes shrink in the first place

Shrinkage is a fabric relaxing and then recoiling. A textile scientist writing in The Conversation describes it as fibers that were stretched during manufacturing relaxing back toward a less-stretched state when heat, moisture and mechanical action (agitation) hit them. Loosely knitted fabrics are more susceptible, because there is more room for the fibers to pull together.

Cotton has its own mechanism. According to Live Science, cotton fibers swell when wet and then contract as they dry. That is why a cotton sweatshirt can come out of the dryer a size smaller even if the water was only warm.

This gives you three levers:

1. Temperature of the wash water and the dryer.
2. Motion from agitation, spin speed and tumbling.
3. Time, meaning how long the fabric sits in heat, especially in the dryer.

Pull any one of these down and shrinkage drops. Pull all three down and most garments hold their size for years.

Which fabrics shrink and which barely move

Not every garment needs the same caution. Spend your effort where the risk is.

The fabric list comes from laundry experts quoted by Martha Stewart, which names cotton, wool, linen, silk, bamboo, viscose and rayon as prone to shrinking and nylon, polyester and spandex as least likely to. The same piece notes that loosely woven fibers shrink more than tight weaves.

What about an 80% cotton, 20% polyester shirt?

It will shrink, just a bit less than 100% cotton. A cotton industry Q&A says a blend with at least 50% cotton generally behaves like 100% cotton for shrinkage purposes, and that the more non-swelling synthetic fiber a fabric has, the less it shrinks. So give a cotton-poly blend the cotton routine, and you will rarely be surprised.

Why the first wash matters most

The same Q&A says the first wetting and tumble-drying cycle reveals about 90% of a cotton or cotton-blend product’s eventual shrinkage, and that all shrinkage is generally realized by about five cycles. In practice: the first wash is the one to be gentle with. After a garment has been through a few cycles, its size is mostly settled.

Before you wash: read the label

The care label is the manufacturer’s instruction for that exact fabric, trim and construction. The American Cleaning Institute advises following it because fabrics and trims have different requirements, and notes that high heat can cause shrinkage.

A few label notes worth knowing:

• “Preshrunk” means the fabric was treated at the factory and should stay the same size after washing and drying, according to an appliance maker’s care guide. Preshrunk is not a promise against hot-dryer abuse, though, so keep the heat low anyway.
• “Dry clean only” is serious. The American Cleaning Institute says washing such a garment can cause residual shrinkage even if the fabric was preshrunk, that washing it is at your own risk, and that cool-water hand washing is the least aggressive option.
• Symbols tell you the maximum wash temperature and whether tumble drying is allowed. If the symbols look like a foreign language, our laundry symbols cheat sheet decodes them, and our beginner’s guide to fabric care covers the basics.

Two more preparation steps cost nothing. Sort by fabric as well as color, so a delicate rayon top is not tumbling with a heavy towel. And put small items and hosiery in a mesh bag; a university extension laundering guide recommends mesh bags for small items and turning permanent press garments inside out to reduce stress on them.

How to wash without shrinking

Choose cold water

Cold water is the single easiest change. The American Cleaning Institute says cold water is gentler and can protect clothes from shrinking, while the wrong temperature can cause fading, shrinking or bleeding. It also says about 90% of the energy a washing machine uses goes toward heating water, so cold is cheaper too.

Research on wash settings points the same way. University of Leeds researchers found that a quicker, cooler wash (30 minutes at 25°C against 85 minutes at 40°C) can extend garment life. If you want the full case for cold, our piece on what cold water can and cannot do goes through it.

If a label allows cold or lukewarm, pick cold. Retailer care guidance for cotton and linen, such as this US fashion retailer’s garment care page, also suggests washing inside out in cold or lukewarm water.

Pick a gentle cycle and a lower spin

Agitation is the second driver. An appliance maker’s guide recommends cold water on a delicate cycle with a lower spin speed to stretch fabrics less. Another appliance guide adds that hot water, vigorous agitation, high dryer heat and long drying cycles all contribute.

Don’t overload the drum, either. A packed drum forces fabric to rub and twist, and clothes that cannot move freely tend to come out tangled and stretched in odd places.

Dose with less guesswork

Detergent does not shrink clothes, but sloppy dosing makes laundry harder: too much leaves clothes feeling stiff, and people respond by running another hot cycle. Pre-measured detergent takes the measuring out. If you already suspect overdosing, our guide on stopping detergent residue on clothes shows how to cut back.

Hand wash what matters

Wool sweaters, silk blouses and anything you love get a sink wash. Use cool water, a small dose of detergent, a gentle swish and a rinse. Don’t wring or twist; press the water out in a towel. Our step-by-step hand washing guide walks through it. With Toss & Go sheets, dissolve half a sheet in a sink or basin.

How to dry without shrinking

The dryer causes more shrinkage than the washer for most households, because it combines heat, tumbling and time.

The safest option: air dry

The American Cleaning Institute’s laundry basics say to air dry delicates and items prone to shrinking. A maker of outdoor apparel says the same in its care instructions: hang dry or dry flat, and if you must use a dryer, choose the lowest suitable heat.

A few practical rules:

• Knits and sweaters: dry flat on a towel or mesh rack. The weight of water can stretch knits on a hanger or line. Woolmark recommends flat drying wool knitwear unless the care claim allows tumble drying, and keeping wool out of direct sun and direct heat.
• Tees and cotton shirts: hang on a hanger, or on a line by the hem if the shoulders would stretch.
• Jeans: air dry, or tumble on low just until slightly damp, then hang. We cover this in our guide to washing jeans properly.
• Hoodies: the thick cotton body and ribbed cuffs are especially prone to tightening. This hoodie washing walkthrough has specific tips for washing hoodies without shrinking them.

No yard or balcony? Our indoor clothes drying guide shows how to air dry fast without a damp smell, which matters in small apartments and dorms.

If you use a dryer

Set it to low heat or an air-only cycle. The same appliance maker’s guide recommends low or no heat, or an Air Only cycle if your dryer has one. The American Cleaning Institute lists the Delicate/Low Heat setting as best for lightweight or heat-sensitive fabrics to help prevent shrinking.

Then watch the clock. Overdrying is a common mistake: the fabric finishes drying, and keeps tumbling in hot air. Pull items while they are still faintly damp and finish them on a hanger. Lighter items and heavier ones dry at different speeds, so check often rather than running a long default cycle.

What about the 30-minute laundry rule?

The 30-minute laundry rule is about smell, not size. It says to take clothes out of the washer within 30 minutes of the cycle ending, so they don’t turn musty, according to Ideal Home. It will not stop shrinkage. But it pairs well with the habits above: when you move a load promptly to the hanger or rack, damp fabric spends less time bunched in the drum. If a load has already gone musty, see our guide to removing musty smell from clothes.

A routine you can follow every time

1. Check the care label and the fiber content.
2. Sort by fabric weight and type, not only by color.
3. Turn cotton and linen inside out, and bag small or delicate items.
4. Wash in cold water on a delicate or gentle cycle with a lower spin.
5. Remove the load promptly.
6. Air dry knits and anything shrink-prone; use low heat or air-only for the rest.
7. Stop the dryer while items are slightly damp and hang them to finish.

For new clothes, apply this routine strictly for the first wash, since that is when most of the shrinking happens. If you buy cotton for a close fit, expect a small change and consider sizing with that in mind.

Perspective: why a pre-measured sheet suits a gentle routine

We hear the same story from people who start paying attention to how they wash: the habits that protect clothes are simple, but they are easy to skip when laundry is a chore. Cold water, a gentle cycle and less guesswork are the whole plan.

That is why we made Toss & Go sheets pre-measured. One sheet is a full dose for a regular load, two for a large or heavily soiled load, and half a sheet for a small load or a sink wash. There is no jug to tip, no cap to fill and no second-guessing the line on the cup.

The sheets are designed to dissolve in cold water and are made for HE and standard machines, front-load and top-load. Drop the sheet in the drum on top of the clothes, never in the dispenser drawer, and start a cold, gentle cycle. For a delicate sweater, dissolve half a sheet in a basin and hand wash.

We also publish every intentionally added ingredient at purecise.com/pages/ingredients, because we think people who care about their clothes want to know what goes onto them.

Purecise

Make the cold, gentle wash easy

If you are switching to cold-water washing, Toss & Go sheets are built for it. They are pre-measured and designed to dissolve in cold water, and they work in HE and standard machines. The Box of 50 is $19.95 and covers up to 100 loads, in plastic-free cardboard packaging. The Travel 3-Pack is $15.95 for three envelopes of 5 sheets, covering up to 30 loads, and suits trips, dorms and shared laundry rooms.

Choose Fresh Meadow, which is lightly scented (its fragrance includes Linalool), or Fragrance Free, which has no added fragrance or dyes. Subscribe and save 15%. Every order comes with our 30-day Keep It or Toss It Guarantee: a refund or a replacement, with nothing to send back. You can see the full range here, and our guide to reading detergent ingredient labels helps you compare any detergent.

Common mistakes that cause shrinking

• Washing everything hot because it “cleans better.” Cold works for most loads, and it is the safer choice for shrink-prone fabrics.
• Using the dryer’s default setting. Many defaults run hotter and longer than a cotton tee needs.
• Mixing heavy towels with light tops. The tops will be overdried while you wait for the towels.
• Hanging heavy knits. Hangers and lines stretch wet wool; dry it flat.
• Ironing too hot. Heat can distort fibers. For cotton and linen, a medium iron setting is a common care recommendation, and polyester can melt if it gets too hot, according to a university extension fiber guide.
• Ignoring pilling and rubbing. Rough washing wears fabric surface as well as size. See how to prevent fabric pilling.

FAQ

Can cold water alone stop clothes from shrinking?

It helps a lot, but it is not a guarantee. Cold water lowers the thermal part of the problem, while agitation and dryer heat still act on the fibers. Pair cold water with a gentle cycle and air drying or low heat for the best result.

Will 80% cotton and 20% polyester shrink?

Yes, though usually less than 100% cotton. A blend with at least 50% cotton generally behaves like cotton, so wash it cold and dry it on low heat or flat. Expect the biggest change in the first wash.

Does washing clothes less often reduce shrinkage?

Fewer wash-and-dry cycles means fewer chances for heat and tumbling to act on the fabric, so it can help. Since most shrinkage happens early anyway, the bigger gain is handling the first few washes carefully. Wash items when they are actually dirty or smell, and air out the rest.

Is it safe to wash dry clean only clothes?

It carries risk. The American Cleaning Institute says washing a dry clean only item can cause shrinkage even if the fabric was preshrunk, and the choice is yours. If you try it, cool-water hand washing is the gentlest route it identifies.

Can I use detergent sheets on a cold, delicate cycle?

Toss & Go sheets are designed to dissolve in cold water and work in HE and standard machines. Place one sheet in the drum on top of the clothes, not in the dispenser drawer, then run your cold, gentle cycle. Use half a sheet for a small load.

Sources

• Why do some clothes shrink in the wash? (The Conversation)
• Why does cotton shrink? (Live Science)
• How to Not Shrink Clothes, According to Laundry Experts (Martha Stewart)
• Sourcing the Best Cotton Products (CottonWorks)
• Cleaning Uniforms (American Cleaning Institute)
• Laundry Basics (American Cleaning Institute)
• Ask ACI: When Clothes Are Really Dry Clean Only
• Cold Water Saves (American Cleaning Institute)
• MF1014 Laundering guide (K-State)
• How to avoid shrinking your clothes during washing and drying
• Quicker and cooler is best for clothes (University of Leeds)
• How do I care for my garments so they last longer?
• How to Help Prevent Shrinking Clothes in Your Laundry
• How to Prevent Clothes from Shrinking: 5 Helpful Tips
• Product Care Instructions (Columbia Sportswear)
• How do I dry wool? (Woolmark)
• Understand Your Fibers (University of Georgia Extension)
• The 30-minute laundry rule (Ideal Home)
• Wash Hoodies the Right Way Without Shrinking Them

Recommended

• Indoor Clothes Drying: How to Do It Fast and Fresh
• How to Wash Jeans Properly: Cold, Inside Out, Air-Dried
• 10 Laundry Hacks You Wish You Knew Sooner
• Fabric Care for First-Time Laundry Doers: A Beginner’s Guide