Fingering weight yarn (Craft Yarn Council Category 1: Super Fine) is the workhorse of modern indie dyeing and sock knitting. Known in the UK and Australia as 4-ply, it creates lightweight, durable, and drapeable knitwear.
Quick Specifications
Popular Projects for Fingering Weight
- Hand-Knit Socks: Knitted tightly at 30–32 sts per 4 in on US 1–2 needles with a 75/25 wool/nylon blend for maximum longevity. Check our Sock Knitting Guide for heel techniques.
- Intricate Colorwork Sweaters: Fine fingering weight creates detailed stranded colorwork (Fair Isle) motifs without excessive bulk or overheating.
- Drapey Shawls & Scarves: Worked on larger needles (US 4–6 / 3.5–4.0 mm) for a light, fluid fabric that drapes effortlessly over the shoulders.
- Baby Garments: Soft superwash merino or cotton blends provide gentle, non-irritating warmth for newborns.
When knitting socks, aim for a dense, firm fabric (around 32 sts per 4 in / 10 cm) so the stitches do not stretch out and wear through. For shawls, use larger needles for open drape and softness.
Fingering, Sock, 4-Ply or Baby?
No weight collects more names than this one, and the names are not reliable synonyms. All four sit in CYC Category 1, but they tell you different things — and only one of them is about thickness.
| Label | What it means | What to check |
|---|---|---|
| Fingering | The weight itself, US usage | Usually 28–32 sts per 4 in10 cm |
| Sock | Intended use, not thickness — implies durability | Nylon content; some “sock” yarn is sport weight |
| 4-ply | UK and Australian name for the weight | Not the number of strands spun together |
| Baby | Fiber and treatment — soft, machine washable | Spans fingering through DK; read the gauge |
A yarn labeled “sock” without nylon or another nylon-substitute will still knit a beautiful sock — it will just wear through at the heel sooner. If you want socks that survive a winter of real use, look for roughly 20–25% nylon rather than trusting the word on the band.
How much yarn for a pair of socks?
At a typical fingering gauge of 28–32 sts per 4 in10 cm, a standard crew-height pair takes roughly:
- US women's 6–8: 350–400 yd320–365 m
- US women's 9–11 / men's 8–10: 400–450 yd365–410 m
- US men's 11–13: 450–550 yd410–500 m
The standard 3.5 oz100 g sock skein runs 400–460 yd365–420 m, which is why it is sold that way — one skein, one pair, with little to spare above a men's 10. Knee-highs or a tall cuff need a second skein.
Recommended US & International Fingering Yarns
Widely stocked fingering and sock yarns with verified specifications:
Cascade Yarns Heritage
75% superwash merino wool, 25% nylonA superwash merino and nylon sock yarn stocked in most US yarn shops; the nylon adds durability where heels and toes wear through first.
West Yorkshire Spinners Signature 4 Ply
75% wool (35% Bluefaced Leicester), 25% nylonWest Yorkshire Spinners state that the yarn has won 'Best Sock Yarn' at the British Knitting and Crochet Awards for several years running. Superwash treated, and 35% of the wool is Bluefaced Leicester.
Malabrigo Sock
100% superwash merino woolKettle-dyed single-ply superwash merino from Uruguay, with 440 yd402 m on a 3.5 oz100 g skein.
Frequently Asked Questions
What is the difference between Fingering weight and Sock yarn?
All sock yarns are fingering weight, but not all fingering weight yarns are suitable for socks. True sock yarn typically contains 20–25% nylon (polyamide) blended with tightly twisted superwash wool for durability against friction in shoes. 100% merino fingering yarn is softer and ideal for shawls and sweaters, but wears through quickly on heels and toes.
What is 4-ply yarn in UK/AU patterns?
In the UK, Australia, and New Zealand, '4-ply' is the standard term for fingering weight yarn, working to a gauge of approximately 28 stitches per 4 in10 cm on US 2–3 (2.75–3.25 mm) needles.
How many yards of fingering yarn do I need for a pair of adult socks?
A standard 3.5 oz100 g skein of fingering weight yarn (typically 400 to 440 yards365 to 400 m) is generally enough for one full pair of adult socks up to a US men's size 11.
Yarn weight categories, their standard gauge ranges and the recommended needle sizes on this page follow the Craft Yarn Council's Standard Yarn Weight System. Needle size equivalents are cross-checked against the CYC knitting needle size chart, and the WPI figures against CYC’s wraps-per-inch chart.