Yarn Weight Chart (0 Lace to 7 Jumbo)

The yarn weight numbers 0–7: what each is called, its gauge, hook and needle sizes, and wraps per inch.

Yarn weight

0 Lace

1 Super Fine

2 Fine

3 Light

4 Medium

5 Bulky

6 Super Bulky

7 Jumbo

0 Lace

1 Super Fine

2 Fine

3 Light

4 Medium

5 Bulky

6 Super Bulky

7 Jumbo

4 Medium

Worsted, afghan, aran

Knit gauge

16–20 sts per 4 in (10 cm)

Needles

4.5–5.5 mm (US 7–9)

Crochet gauge

11–14 sc per 4 in (10 cm)

Hooks

5.5–6.5 mm (US I-9 – K-10½)

Wraps per inch

9–12

Yarn weights at a glance

Yarn weights at a glance
Weight	Knit sts	Needle mm	Crochet sts	Hook mm
0 Lace	33–40	1.5–2.25	32–42	1.4–2.25
1 Super Fine	27–32	2.25–3.25	21–32	2.25–3.5
2 Fine	23–26	3.25–3.75	16–20	3.5–4.5
3 Light	21–24	3.75–4.5	12–17	4.5–5.5
4 Medium	16–20	4.5–5.5	11–14	5.5–6.5
5 Bulky	12–15	5.5–8	8–11	6.5–9
6 Super Bulky	7–11	8–12.75	7–9	9–15
7 Jumbo	≤ 6	12.75+	≤ 6	15+

How it works

The Craft Yarn Council numbers yarn from 0 (lace) to 7 (jumbo). The number is printed on most US yarn labels as a little skein symbol.

Each weight comes with a typical gauge and tool size: medium (4, worsted) knits 16–20 stitches per 4 in on 4.5–5.5 mm needles and crochets 11–14 single crochets per 4 in on a 5.5–6.5 mm hook.

Wraps per inch (WPI) helps with unlabeled yarn: wrap it around a ruler without stretching and count the wraps in one inch.

Frequently asked questions

What is weight 4 yarn?

Medium: worsted, afghan or aran yarn. Knit gauge 16–20 stitches and crochet gauge 11–14 single crochets per 4 in.

Is DK the same as weight 3?

Yes: weight 3 (light) covers DK and light worsted yarn.

Can I swap one yarn weight for another?

Only with a new gauge swatch: a different weight changes the size of every stitch, and the yardage you need.

Yarn weights