Pick the fabric and what you want: whether your wash will shrink it, how to shrink it on purpose, or how to unshrink it, each line quoted from care guides, textile scientists and the brands’ own care pages.
Cotton · Warm wash · Dryer, normal
Likely to shrinkA warm wash can shrink cotton a little, and a dryer on normal or high heat shrinks it. Safest: cold or 30 °C, on a gentle cycle; air dry; in a dryer, the lowest heat.
- Does it shrink?
- Yes, mostly in the first washes
- Your wash
- Warm + dryer, normal: likely
- How much
- Not given by two guides
| Wash | Air dry | Dryer, low | Dryer, normal |
|---|---|---|---|
| Cold | unlikely | a little | likely |
| Warm | a little | a little | likelyyours |
| Hot | likely | likely | likely |
Does cotton shrink?
Yes. Cotton shrinks, most of it in the first washes, and more in the dryer
- “So, does cotton shrink in the wash? In the first wash, unless you hand wash cold and air-dry, probably.” — Cleanipedia
- “most cotton fabrics will end up shrinking over time, if not immediately, if the water used is too hot.” — Persil
- “In fabrics like cotton, rayon or bamboo, shrinkage occurs with the help of water and mechanical action.” — TODAY
Your wash: Warm, dryer, normal
What shrinks it: hot water, and above all the dryer
- “Drying your cotton clothes at too high a temperature will also cause the fibers to shrink.” — Persil
- “So, the warmer the water, the more your cotton clothes will shrink.” — Maid2Match
- “However, if you machine dry the clothing, it can indeed shrink for good.” — TODAY
To keep it its size
Wash: Cold or 30 °C, on a gentle cycle
- “Set your washing machine to cold or 30 degrees, and its agitation cycle to delicate.” — Cleanipedia
- “So, using colder temperatures when washing and drying your cotton clothes is the key behind how to keep cotton from shrinking.” — Persil
Dry: Air dry; in a dryer, the lowest heat
- “Set your dryer to the lowest heat.” — Cleanipedia
- “Prevent future shrinking by air-drying cotton garments while they’re still damp and always following the care label instructions.” — Real Simple
Why clothes shrink
Clothes are stretched as they are made; water lets them relax back, and that is the shrink
- “In essence, shrinkage is the garment trying to go to its fully relaxed state when the fabric becomes wet,” — TODAY
- “fabric shrinkage, the consequence of tension applied to yarn and fabric during manufacture.” — Cleanipedia
- “During the process of creating linen fabric, these flax fibers stretch. When they become wet, the fibers relax back to their original, unstretched state, resulting in a bit of shrinkage.” — Parachute
Most of it happens in the first few washes
The dryer shrinks more than the wash
- “If you lay your wet garment flat to dry after washing, no additional shrinkage will occur” — TODAY
- “Hot water and high dryer temperatures are the fastest ways to shrink your clothes.” — Maid2Match
- “it’s best to avoid using a tumble dryer if you’re concerned about keeping your cotton shirts in perfect shape.” — Cleanipedia
Preshrunk and prewashed pieces shrink less
If you use the dryer, take it out before it is bone dry
Its care label wins over any guide, this one too
- “Always check the care label” — Cleanipedia
- “Before you start the shrinking process, always check the garment’s care label.” — Maid2Match
Where the guides differ
Is it the heat or the tumbling that shrinks cotton?
- “Heat has no effect on the shrinkage of cotton; it’s actually the tumbling action,” — TODAY
- “Drying your cotton clothes at too high a temperature will also cause the fibers to shrink.” — Persil
- “Cotton naturally shrinks when exposed to heat, which makes dryers a common culprit behind shrunken clothes.” — Real Simple
Boiling water
- “Next, mostly fill it with water, and bring said water to a boil.” — Levi’s blog
- “While it sounds like a great, simple way to shrink clothing, it’s not very effective.” — TODAY
- “I have never tried that and would not recommend it.” — TODAY
Linen in the dryer
- “Any heat has the potential of causing your linen to shrink, so to prevent linen from shrinking, it’s best to avoid all heat settings on your dryer.” — Parachute
- “Most linen can withstand tumble drying with medium to high heat.” — The Laundress
Does linen shrink more than cotton, or less?
Shrinking clothes at home at all
- “By washing garments to try to shrink them, you can cause severe damage to the surface of the garment including pilling and unwanted proportions, so it’s not recommended to shrink clothes at home,” — TODAY
- “But there is a safe way to shrink clothes made of these materials.” — Maid2Match
Every line is quoted from 17 care guides, textile scientists and brands’ care pages, each fact on at least two of them. Checked 2026-10-17. Ours: the three levels and which wash or dryer falls in each for each fabric, read from the quotes under “What shrinks it”, and the short line over each quoted list. The care label on your piece wins.
Quick answer: cotton, linen, wool, cashmere, silk and rayon (viscose) can shrink; polyester and nylon hardly do. Heat, water and the dryer’s tumbling shrink clothes, mostly in the first washes. To keep its size, wash it cold and air dry it. To shrink cotton, jeans or linen on purpose, wash and dry hot. To unshrink it, soak it with conditioner, stretch it, dry it flat.
How to use it
Pick what the piece is made of (the fabric is on its care label) and what you want. Keep its size asks how you wash and dry it and says whether that will shrink it, with a small chart of every wash and dryer for that fabric. Shrink it on purpose gives the method, or says why not. It shrank: unshrink it gives the soak-and-stretch steps. Under every line are the care guides’ own words; open Why clothes shrink and Where the guides differ for the rest. Every answer has its own link to send to whoever does the washing.
Does it shrink? Fabric by fabric
| Fabric | Does it shrink? | What shrinks it | To keep its size | Unshrink? |
|---|---|---|---|---|
| Cotton | Yes, mostly in the first washes | Hot water, and above all the dryer | Cold or 30 °C, air dry | Yes, often |
| Jeans | A little: most are preshrunk | A hot wash and the dryer | Cold, inside out; hang to dry | Worth a try |
| Raw denim | Yes, by design | Its first wash, then heat | Cold, inside out, not often; air dry | Worth a try |
| Linen | Yes, 3–10% | Hot water and a hot dryer | Cold or lukewarm; line dry | Yes, often |
| Wool | Yes, the most | Warm water with rubbing, the dryer | Wool cycle or by hand; flat | Yes, often |
| Cashmere | Yes, like wool | Warm water, rubbing, any heat | By hand or cold delicates; flat | Worth a try |
| Silk | Yes, in heat | Hot water, a dryer, a radiator | By hand, 30 °C at most; no dryer | Worth a try |
| Rayon / viscose | Yes, in warm water | Any warm water, the dryer | By hand in cold water; no dryer | Worth a try |
| Polyester or nylon | Hardly | Only high heat (which can melt it) | Cold or warm; air dry or low | Worth a try |
The chart’s three words (unlikely, a little, likely) for each wash and dryer are ours, read from the guides’ words on what shrinks each fabric. The only figure two of the guides we read share is linen’s: Parachute says “Linen typically shrinks by about 4% but can shrink as much as 10% in certain conditions”, Linoto “3% to 10%”. Your piece’s own care label wins over any chart.
Examples
- A cotton T-shirt, warm wash, dryer on normal: likely to shrink. The warm wash can take it in a little and the dryer does the rest. Cold and air dry keeps it.
- A linen shirt, warm wash, line dried: unlikely to shrink. Linen’s shrink comes from hot water and hot dryers; a prewashed piece shrinks less again.
- A wool sweater that came out of the dryer too small: often, yes, it can come back: a cool soak with a very gentle conditioner or baby shampoo, a towel roll, a stretch, flat to dry.
- Jeans a size too big: a hot wash, then the dryer until completely dry; for just the waist or the knees, dampen that part and iron it dry.
- A polyester dress: it will barely move. A warm wash and a medium dryer can take it in a little; more heat can melt it, so a tailor is the real fix.
Why clothes shrink
Yarn and fabric are stretched as they are made, and water lets them relax back. A P&G fabric care scientist in TODAY: “In essence, shrinkage is the garment trying to go to its fully relaxed state when the fabric becomes wet,” and most of that happens early: “most of that relaxation shrinkage will occur in one to three washings.” The dryer adds more: “If you lay your wet garment flat to dry after washing, no additional shrinkage will occur”. Wool is its own case: its fibres have scales that lock together in warm, soapy water and rubbing, which is felting.
How to shrink a shirt
For a cotton shirt, wash it warm or hot, then dry it on medium or high heat, and try it on as it dries so it does not go too far: “Monitor the drying process and periodically check the fit of your clothing to avoid over-shrinking.” Linen shrinks the same way, with heat. Wool and cashmere are done by hand in lukewarm to warm water, then dried flat; a hot machine wash can felt a sweater down to a child’s size. Polyester and nylon barely shrink, and silk is better taken in by a tailor. Cotton Incorporated warns that shrinking at home can damage a garment, including pilling, so start gently.
How to unshrink clothes
- Fill a sink with lukewarm water and add a little hair conditioner or baby shampoo.
- Soak the piece for 10 minutes to an hour, longer when it shrank more.
- Roll it in a towel for 10 to 15 minutes, so it is damp, not dripping.
- Stretch it one part at a time, holding each pull for a few seconds.
- Lay it flat, weigh it down with books or jars, and let it air dry.
It works best on cotton, wool and jersey, which relax when wet. Bob Vila: “Tighter weaves, such as silk and synthetics, are more resistant to stretching, but it’s worth a try, especially if the original shrinkage was minimal.” Rayon is weak while wet, so go gently.
Where the guides differ
- Heat or tumbling: a P&G scientist says heat has no effect on cotton’s shrink and the dryer’s tumbling does it; Persil and Real Simple blame heat.
- Boiling water: Levi’s boils its jeans to shrink them; a FIT textile professor in TODAY would not recommend it, and TODAY calls pouring boiling water over clothes “not very effective”.
- Linen in the dryer: Parachute says avoid all dryer heat; The Laundress says most linen can take medium to high heat.
- Linen or cotton: Parachute says linen shrinks a bit less easily than cotton; Linoto says it generally shrinks more.
- Shrinking at home at all: Cotton Incorporated does not recommend it; Maid2Match says there is a safe way.
- How long to soak when you unshrink: Oxfam says 10 to 30 minutes, Bob Vila 30 minutes to an hour.
Read next
For the clothes themselves, see NeedleStyle’s soft sweater styles, classy winter outfits with cashmere, casual summer outfits in linen, light blue jeans outfits and denim jacket ideas. The Laundry Symbol Decoder reads the symbols on the care label, the Fabric Types Chart says what each fabric is made of and how it feels, breathes and wrinkles, and the Closet Declutter helps you decide what to keep.
The pages we read
TODAY, with P&G fabric care scientists, Cotton Incorporated and FIT; Real Simple on un-shrinking cotton, with Cotton Incorporated; Cleanipedia on cotton and on which fabrics shrink; Persil; Levi’s customer service and its blog (South Africa, Hong Kong); Maid2Match; Bob Vila; Oxfam; Harvard’s Science in the News; The Woolmark Company; Parachute; Linoto; The Laundress on viscose, silk, linen and cashmere; Whistles; Blue Bungalow; YOLKE; and Homes & Gardens. Every quote was checked against its page on 17 October 2026.
FAQ
Does 100% cotton shrink?
Yes, mostly in its first few washes and most of all in a hot dryer. Washing it cold and air drying it keeps the shrink small; a preshrunk piece shrinks less.
How do you shrink a shirt on purpose?
For cotton, wash it warm or hot, then dry it on medium or high heat, trying it on as it dries. Wool and cashmere are done by hand in lukewarm to warm water and dried flat. Polyester barely shrinks, and silk is better taken in by a tailor.
Can you unshrink clothes?
Often, yes, if it shrank a little: soak it in lukewarm water with hair conditioner or baby shampoo, roll it in a towel, stretch it one part at a time and dry it flat under weights. It works best on cotton, wool and jersey.
Does polyester shrink?
Hardly. Polyester and nylon resist shrinking; only high heat moves them, and the same heat can melt or warp them. Wash cold or warm and dry low.
Does linen shrink?
Yes, by about 3–10%, most of it in the first wash, and less if it was prewashed. Hot water and a hot dryer shrink it; cold or lukewarm water and line drying keep it.
Do jeans shrink in the dryer?
Yes. Most jeans are preshrunk and shrink little if you wash them cold and hang them, but a hot wash and the dryer still take them in. Raw (shrink-to-fit) denim shrinks on its first wash by design.
Why did my wool sweater shrink?
Warm water, soap and the machine’s rubbing make wool’s scales lock together, which felts and shrinks it. Use the wool cycle or cold delicates, or wash it by hand, and dry it flat unless its label says tumble dry.