Worsted Weight Yarn Guide
Worsted weight yarn (Craft Yarn Council Category 4: Medium) is the backbone of North American knitting. Known in Australia as 10-ply and often called Afghan or Aran weight, it offers fast progress, clear stitch definition, and long-lasting durability.
Quick Specifications
Top Projects for Worsted Weight Yarn
- Cozy Pullovers & Cardigans: The classic weight for winter sweaters. Quick to knit and durable for everyday wear. Check out our Sweater Knitting Guide.
- Winter Hats & Beanies: One 100g (3.5 oz) skein is typically enough to knit a full adult beanie. Use our Yarn Calculator to estimate yardage.
- Throw Blankets & Afghans: High durability and warmth make worsted acrylics and wools the top choice for large home projects.
- Mittens & Cold-Weather Accessories: Dense enough on US 7 (4.5 mm) needles to block chilly winter winds.
Not all worsted yarns feel the same. Worsted-spun yarns (like Cascade 220) have combed, parallel fibers for smooth, defined stitches. Woolen-spun yarns (like Brooklyn Tweed Shelter) trap air for a lofty, featherlight sweater with incredible warmth.
Recommended US & International Worsted Yarns
The most popular, verified worsted weight yarn lines across North America:
Knit Picks Wool of the Andes
100% Peruvian Highland WoolKnit Picks' flagship 100% Peruvian Highland Wool, sold direct-to-consumer at a lower price point than most yarn-shop wools, in a huge range of solid and heathered colorways.
Brown Sheep Lamb's Pride Worsted
85% wool, 15% mohairA US classic wool-mohair blend with a distinctive halo, long used in colorwork and outerwear patterns for its durability and rustic texture.
Cascade Yarns 220
100% Peruvian Highland WoolOne of the most popular worsted-weight wools in North America, prized for durability and clean stitch definition in colorwork.
Red Heart Super Saver
100% acrylicThe classic budget acrylic worsted found in almost every US craft store, and probably the single most-knitted yarn in America.
Malabrigo Worsted
100% merino woolSoft single-ply, kettle-dyed merino with rich tonal colorways — a favorite for simple garter and stockinette pieces that let the color do the work.
Berroco Ultra Alpaca
50% Super Fine Alpaca, 50% Peruvian WoolA versatile worsted-weight blend of alpaca softness and wool bounce, available in heathered shades and widely stocked across US yarn shops.
Caron Simply Soft
100% acrylicOne of the best-known acrylic yarns in the US, known for its distinct sheen, soft handle, and wide availability in big-box craft stores.
Brooklyn Tweed Shelter
100% American Targhee-Columbia WoolWoolen-spun in the USA from American fleece, Shelter produces a light, airy fabric with beautiful tweedy flecks and exceptional warmth.
Frequently Asked Questions
Why is Worsted weight the most popular yarn in America?
Worsted weight is the quintessential American yarn weight. It knits up quickly on US 7–8 (4.5–5.0 mm) needles, provides excellent stitch visibility for beginners, and produces warm, sturdy sweaters, hats, mittens, and afghans without being overly bulky.
What is the difference between Worsted and Aran weight?
Both fall under CYC Category 4 (Medium), but Aran is slightly thicker and heavier than traditional Worsted. A typical Worsted yarn produces around 18–20 sts per 4 inches (10 cm), whereas Aran works closer to 16–18 sts per 4 inches. Substituting one for the other requires swatching to ensure correct garment dimensions.
What is the 10-ply equivalent in the UK/Australia?
In Australia and legacy British patterns, '10-ply' corresponds directly to Worsted / Aran weight yarn.