QuestionGauge & yarnBy The Hook Desk18 Oct 2026
Does cotton or acrylic hold an amigurumi shape better?
The two fibres behave differently in three measurable ways: stretch, memory after washing, and how much the finished stitch count drifts over time. Knowing which one your project needs prevents a toy that goes floppy in a month.
Step by step
Note 1Stretch and recovery
A 10 cm strip of cotton sc stretches to about 11 cm under a firm pull and stays there. The same strip in acrylic stretches to 14 cm and springs back to 10.5 cm. That difference is what decides whether a stuffed shape keeps its silhouette or slowly sags.
Practically: a cotton amigurumi keeps crisp edges and sharp corners but dents if you squeeze it hard. An acrylic one bounces back but has rounded, softer edges because the yarn itself compresses.
R4What washing does to the stitch count
Cotton shrinks 3-5% on the first warm wash and then stops. Acrylic does not shrink but the fibres bloom, so the fabric gets slightly thicker and the stitch definition softens; a 24-stitch round reads as 23 by feel even though it is still 24 stitches.
For anything that must stay dimensionally exact — a set of coasters, a fitted hat — measure after washing once, not before. The first wash is the only one that changes anything measurable.
Note 3Blends and what they are good for
A 50/50 cotton-acrylic behaves like a slightly stiff acrylic with better stitch definition, and it is the easiest single answer for amigurumi: it holds shape better than pure acrylic and is softer than pure cotton.
Cotton-bamboo is the worst choice for stuffed work — bamboo has almost no memory, so the piece sags within weeks. It is excellent for bags and market nets, where you want the fabric to drape and stretch.
Where it usually goes wrong
- Choosing cotton for a toy a child will carry around, then wondering why it has gone shapeless.
- Washing the first cotton piece in hot water to 'set' it, which shrinks it 8% instead of 4%.
- Judging an acrylic piece straight off the hook. Acrylic needs one wash to bloom into its final surface.