Heavy Worsted & Aran Weight Yarn

Aran weight yarn, often sold as heavy worsted weight yarn, is a medium-heavy yarn that gives cables and textured stitches bold definition while still working up quickly. It's a favorite for sweaters, hats, mittens and blankets.

What Is Aran Weight Yarn?

Aran falls in the Craft Yarn Council's medium (4) category alongside worsted, but on the heavier end. Typical gauge is 16–18 stitches over 4 inches in stockinette on 4.5–5.5 mm (US 7–9) needles; crocheters usually use a 5–6 mm (H–J) hook. The name comes from the cabled fisherman sweaters of the Aran Islands.

Heavy Worsted vs. Aran Weight Yarn

In the US, "heavy worsted" and "aran" are used for the same thickness, so you can shop them together. Standard worsted is slightly finer (about 18–20 stitches per 4 inches). Many yarns are labeled worsted/aran because they work at either gauge, so check the ball band and swatch before you substitute.

Wool Aran Yarn for Cables and Sweaters

Wool's elasticity and stitch memory make cables pop. Debbie Bliss Cashmerino Aran is a soft merino blend, Paintbox Yarns Wool Mix Aran is an easy-care everyday option, Berroco Ultra Wool is superwash for machine-washable knits, and Debbie Bliss Donegal Luxury Tweed Aran brings a classic tweed look.

Aran Weight Cotton Yarn

Cotton aran yarn is breathable and shows stitches crisply, so it's ideal for summer tops, dishcloths, bags, baby items and crochet amigurumi. Paintbox Yarns Cotton Aran comes in a wide color range. Cotton has little stretch, so expect a firmer fabric than wool at the same gauge.

Acrylic Aran Yarn for Blankets

For blankets and kids' knits that need to go in the wash, acrylic is affordable and hard-wearing. Try Paintbox Yarns Simply Aran or Stylecraft Special Aran.

Comparing Yarn Weights

Want a lighter fabric? See worsted weight yarn or DK weight yarn. For faster projects with bigger stitches, try bulky weight yarn. Compare every weight in yarn by weight.

Aran Weight Yarn FAQ

Is aran weight the same as heavy worsted? Yes. In the US, heavy worsted and aran describe the same thickness.

Is aran weight the same as worsted weight? They're close and share the medium (4) category, but aran is slightly heavier. Swatch to confirm gauge.

Can I use aran yarn in a worsted pattern? Often, yes. Go down a needle size if your swatch comes out too large.

What needle size is used for aran yarn? Usually US 7–9 (4.5–5.5 mm).

Is there cotton aran weight yarn? Yes. Paintbox Yarns Cotton Aran is a popular choice for summer garments and homewares.