Shrinkage is the change in fabric size after washing. Natural and regenerated fibres such as cotton and viscose shrink more than synthetics like polyester.
Why fabric shrinks
- Fibres relax after the tension of weaving or knitting is released
- Fibres swell when wet and do not fully return
- Heat from washing or tumble drying
How to control it
- Pre-shrinking: finishing processes stabilise the fabric before cutting.
- Testing: ask for a wash test and agree an acceptable limit.
- Pattern allowance: add a small allowance where needed.
- Blends: polyester blends shrink less than pure cotton or viscose.
Agree it in writing
Put the shrinkage limit in your purchase order so both sides test against the same standard.
Need a low-shrink fabric? Tell us your garment and wash method.