Cotton and acrylic dominate the affordable-yarn market but produce very different fabric. Here's how each performs across stitch definition, drape, durability, and care.
Cotton shows stitch definition crisply, holds shape well, and is machine-washable — the standard choice for amigurumi, dishcloths, market bags, and summer garments. Acrylic is softer, drapier, more affordable per yard, and easy-care — the go-to for blankets, scarves, hats, and beginner projects. Cotton splits less easily and shows colorwork better, but is heavier and dries slowly. Acrylic is lighter and dries fast but can pill. For amigurumi, cotton is recommended; for blankets and wearables that need warmth, acrylic or wool-acrylic blends. Brands to know: cotton — Paintbox Simply Cotton, Lily Sugar'n Cream, Drops Paris; acrylic — Lion Brand Vanna's Choice, Red Heart Super Saver, Paintbox Simply Aran.
| Property | Cotton | Acrylic |
|---|---|---|
| Stitch definition | Crisp, clear | Soft, slightly fuzzy |
| Drape | Stiffer, holds shape | Softer, more flowy |
| Weight | Heavier per yard | Lighter per yard |
| Warmth | Cool — summer-friendly | Warm — winter-friendly |
| Care | Machine wash + tumble dry | Machine wash + tumble dry |
| Durability | Excellent (especially mercerized) | Good (can pill over time) |
| Cost per skein | Higher (~$3–8) | Lower (~$2–5) |
| Best for | Amigurumi, dishcloths, summer wear, market bags | Blankets, hats, scarves, beginner projects |
| Allergy-safe | Yes | Some sensitivity possible |
| Beginner-friendly | Yes — splits less | Yes — softer on hands |
Cotton's tight twist means the stitches show clearly — every sc, dc, and increase reads cleanly in the finished piece. That matters for amigurumi where a fuzzy stitch obscures the shape. Cotton also holds the polyfill stuffing without showing through when worked at a tight gauge (4mm hook with worsted cotton, or 3.5mm with DK cotton). The downside: cotton is heavier, so a 30cm amigurumi feels noticeably weightier than the same piece in acrylic.
Acrylic is softer in the hand, drapier in the finished piece, and warmer — three things blankets and scarves want. It's also lightweight, so a king-sized acrylic afghan won't crush the recipient. The main concerns are pilling (fibers ball up at high-friction spots) and flammability (synthetic fibers melt rather than burn — relevant for items near open flames). Acrylic-wool blends like Caron Simply Soft and Bernat Softee Chunky split the difference: drape of acrylic, warmth and stitch definition of wool.
Both fibers tolerate machine wash and tumble dry on low. Cotton holds up to many wash cycles without losing shape — mercerized cotton is especially durable. Acrylic is technically more durable to wash cycles but tends to pill where rubbed (under arms, sweater elbows). For items that'll be washed often (dishcloths, baby blankets), cotton wins long-term.
Is cotton or acrylic better for amigurumi?
Cotton. Stitch definition is crisper, the polyfill doesn't show through at a tight gauge, and the piece holds its shape long-term. Acrylic works for amigurumi but produces a softer, fuzzier-looking result.
Is acrylic yarn good for blankets?
Yes — acrylic is the most popular yarn for crochet blankets. It's affordable, soft, machine-washable, drapes well, and produces lightweight finished pieces. Wool-acrylic blends add warmth without the cost of pure wool.
Does cotton yarn shrink when washed?
Pure cotton can shrink ~3–5% on first wash. Mercerized cotton (which is treated to be more stable) shrinks less. Pre-wash a swatch before committing to a fitted item.
Is acrylic yarn safe for babies?
Generally yes, but check for soft-feel labels ("baby acrylic" or "super soft") since standard acrylic can feel scratchy. Cotton or cotton-acrylic blends are the safest choice for newborn items.
Can I mix cotton and acrylic in the same project?
Yes, but be aware they shrink differently in the wash. If you're stripe-mixing, hand-wash to prevent uneven shrinkage. Many cotton-acrylic blend yarns combine the best of both already (e.g. Paintbox Cotton Aran).
Why does my acrylic pill so quickly?
Pilling happens where fabric rubs (under arms, sweater elbows, blanket edges). Lower-grade acrylic pills more; higher-grade brands like Lion Brand Heartland and Caron One Pound resist it better.