Guide
Real yarn from Cascade Yarns, Lion Brand, Red Heart, Rowan and more — with verified yardage, gauge and needle size for each weight category.
Quick summary: Pattern instructions often just say "worsted weight" or "DK," which tells you little about what's actually on the shelf at your local yarn shop. This guide starts from real, currently-sold products, with specifications taken directly from the manufacturers' own product pages.
Yarn weight names ("fingering," "DK," "worsted," "Aran") are only a rough guide — two yarns labeled the same way can still knit up at noticeably different gauges. Once you know which real products fall into which weight category, it becomes much easier to substitute yarn confidently, whether the original pattern calls for a yarn that's out of stock or one you simply can't get where you live. Use our yarn substitution calculator once you've found an alternative in the right weight category below.
The US and UK markets are dominated by a mix of long-established mills and a handful of newer, widely-distributed favorites:
Company locations and product specifications above come from the brands’ own sites, including West Yorkshire Spinners. Weight categories follow the Craft Yarn Council’s Standard Yarn Weight System. Always knit a swatch and trust the ball band over any category name.
Need a full conversion chart for all standard yarn categories? Explore our comprehensive Standard Yarn Weights Guide & Chart (CYC 0–7) for gauge ranges, wraps per inch (WPI), and US needle sizes.
The best-known mohair-silk lace yarn in the UK market, often knitted as a single strand or held together with a heavier yarn for extra halo.
Single-ply, cloud-soft baby merino dyed in rich watercolor colorways, ideal for heirloom shawls and fine scarves.
One of the most widely used US sock yarns, with a nylon blend that adds durability to heel and toe wear.
Multiple-time winner of Best Sock Yarn at the British Knitting & Crochet Awards, spun in Yorkshire from Bluefaced Leicester wool.
Hand kettle-dyed single-ply yarn from Uruguay, a fixture in US indie-dyer-style shawl and sock patterns.
The sport-weight version of the Cascade 220 family, with the same excellent stitch definition in a lighter fabric.
A hard-wearing, economical sport-weight acrylic yarn perfect for baby clothes, lightweight blankets, and active wear.
LoveCrafts' own budget acrylic DK, a common US-pattern substitute for Stylecraft Special DK thanks to a near-identical gauge and huge color range.
The UK's best-known baby DK, a soft nylon-acrylic blend chosen for machine-washability in newborn and children's patterns.
An affordable, widely available machine-washable acrylic-wool blend — one of the most common DK-weight yarns on US craft store shelves.
The UK's best-selling DK acrylic, a staple of blanket and charity-knitting patterns for its low cost and huge color range.
Knit 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.
A US classic wool-mohair blend with a distinctive halo, long used in colorwork and outerwear patterns for its durability and rustic texture.
One of the most popular worsted-weight wools in North America, prized for durability and clean stitch definition in colorwork.
The classic budget acrylic worsted found in almost every US craft store, and probably the single most-knitted yarn in America.
Soft single-ply, kettle-dyed merino with rich tonal colorways — a favorite for simple garter and stockinette pieces that let the color do the work.
A versatile worsted-weight blend of alpaca softness and wool bounce, available in heathered shades and widely stocked across US yarn shops.
One of the best-known acrylic yarns in the US, known for its distinct sheen, soft handle, and wide availability in big-box craft stores.
Woolen-spun in the USA from American fleece, Shelter produces a light, airy fabric with beautiful tweedy flecks and exceptional warmth.
A heavier-weight sibling of Cascade 220, for chunky sweaters and blankets that knit up in a fraction of the time.
A soft, 3-ply bulky merino yarn that knits up fast while resisting pilling better than single-ply chunky yarns.
An extremely popular one-skein-hat-and-cowl yarn in the US — quick to knit up and a common choice for beginner projects.
A lightly fullered single-ply super bulky yarn with hand-dyed depth, loved for rapid one-evening winter hats and cowls.
A plush chenille-style super bulky yarn widely used across North America for quick, cozy throw blankets and pillows.
The paper band around a skein of yarn usually has everything you need to judge whether it will work for your project: yardage (meters or yards per gram weight), fiber content, recommended gauge, recommended needle size, and care instructions. See our ball band dictionary entry for a full explanation, or the fiber lexicon for more on the fiber types themselves.
The same yarn is often labeled differently on the two sides of the Atlantic. What the US calls "worsted weight" is close to what the UK calls "Aran" (though UK Aran runs very slightly heavier), and the US "DK" and UK "double knitting" are the same thing. When in doubt, ignore the printed weight name and compare yardage and gauge on the ball band instead — that's the only reliable way to tell if two yarns really match.
Yes. Cascade Yarns is headquartered in Tukwila, Washington, and distributes to yarn shops across North America. Like many US and UK yarn brands, though, the wool itself is often spun and dyed abroad — Cascade 220, for example, is made from Peruvian Highland Wool.
Traditional Fair Isle patterns use fine, springy Shetland wool, most famously from Jamieson's of Shetland and Jamieson & Smith. Its slight halo and give make stranded colorwork easier to block flat, which is why it's still the first choice for authentic Fair Isle yoke sweaters.
All three are 100% Peruvian Highland Wool from the same family, just spun to different thicknesses. 220 Sport is the finest (150m/50g), standard 220 is worsted weight (200m/100g), and 220 Grande is the thickest (200m/200g) for fast, bulky projects. You can substitute between them by matching yardage rather than skein count.
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