Crochet hooks come in a wide range of sizes. Since the sizing of needles and hooks is not the same in England and Canada as in the United States, refer to these charts when converting to a different sizing standard.

 

Plastic and Aluminum

 

US English mm
B 1 12 2.25
C 2 11 2.75
D 3 10 3.25
E 4 9 3.5
F 5 8 3.75
- 5 1/2 - 4.0
G 6 7 4.0/4.25
G 1/2 7 - 4.5/4.75
H 8 6 5.0
I 9 5 5.25/5.5
J 10 4 5.75/6.0
K 10 1/2 2 6.5
L 11 - 8.0
M 13 - 9.0/9.25
N 15 - 9.0/10.0
P - - 10.0/11.5
Q - - 15.75/16.0
S - - 19.0

 

Steel

US English mm
Boye Susan
Bates
00 - 3.5 2.70
0 - 3.25 2.55
1 3/0 2.75 2.35
2 2/0 2.25 2.20
3 1/0 2.1 2.1
4 1 2.0 1.75
5 1 1/2 1.9 1.7
6 2 1.8 1.6
7 2 1/2 1.65 1.5
8 3 1.5 1.4
9 4 1.4 1.25
10 5 1.3 1.15
11 5 1/2 1.1 1.05
12 6 1.0 1.0
13 6 1/2 .85 .95
14 7 .75 .9
Tags: conversion