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List of United States standard crochet hook and knitting needle sizes

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Title: List of United States standard crochet hook and knitting needle sizes  
Author: World Heritage Encyclopedia
Language: English
Subject: Crochet, Crochet hook
Publisher: World Heritage Encyclopedia

List of United States standard crochet hook and knitting needle sizes

Accurate needle and hook sizing is important to knitting and crochet. Yet no uniform international standard exists for these tools.[1]

The Craft Yarn Council of America, and industry trade association, has formulated standard crochet hook and knitting needle sizes in order to regularize domestic United States sizing for these tools. Its goal is to encourage consistent manufacture and labeling of crochet and knitting tools around metric measurements.[2]

Crochet hook sizing is measured by the thickness of the tool's shaft.[3] Traditionally, North American crafters have used a hook gauge to double check knitting needle and crochet hook sizing.

Standard crochet hook sizes

Millimeter range Crochet hook size (numeric) Crochet hook size (letter)
2.25 mm 1 B
2.75 mm 2 C
3.25 mm 3 D
3.5 mm 4 E
3.75 mm 5 F
4 mm 6 G
4.5 mm 7
5 mm 8 H
5.5 mm 9 I
6 mm 10 J
6.5 mm 10.5 K
8 mm 11 L
9 mm 13 M
10 mm 15 N
11.5 mm 16 P
15 mm 19 P/Q
16 mm Q
19 mm 35 S
25 mm 50


  1. ^ Janine Flew, Diana Crossing (2006). Knit. Murdoch Books. pp. 10–11. ISBN . Retrieved 2008-10-11. 
  2. ^ "Hooks & Needles". Craft Yarn Council of America. Retrieved 2008-10-11. 
  3. ^ Debbie Stoller (2006). Stitch 'N Bitch Crochet: The Happy Hooker. Workman Publishing. pp. 13–15. 
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