Quick answer: Cotton has no elasticity and is heavier than wool. Use a firm tension, go down a needle size to prevent sagging, and always wash and dry your swatch before measuring gauge.
What makes cotton different
Cotton is inelastic, heavier than wool, and absorbs moisture — cool and breathable but prone to stretching under its own weight. Gauge shifts significantly after washing.
Best projects for cotton
- Dishcloths, market bags, and household items
- Summer tops and tanks
- Baby items where machine washability matters
- Avoid: stretchy ribbing, socks, anything needing elastic recovery
Tips for knitting with cotton
- Go down 0.5mm needle size from your usual — cotton knitted too loosely sags.
- Use circular needles or rest work on the cable for large pieces.
- Swatch and block before measuring — cotton relaxes after washing.
- Rest your wrists frequently — cotton is heavier than wool.
- Metal or aluminum needles can work better than bamboo, which cotton grips almost too well.
Common mistakes
- Expecting ribbing to pull in like wool — use fewer stitches for cuffs in cotton
- Not blocking before measuring — cotton grows significantly after washing
- Using needles too large — fabric will sag under the weight