Crochet Hook Sizes Conversion Chart: Metric, Japanese, UK / Canadian & US.

 

Crochet Hook Size Conversion Table
Metric (mm) Japanese UK / Canadian US
2 2/0 14 -
2.25 3/0 13 B/1
2.5 4/0 12 -
2.75 - - C/2
3 5/0 11 -
3.25 - 10 D/3
3.5 6/0 9 E/4
3.75 - - F/5
4 7/0 8 G/6
4.5 - 7 7
5 8/0 6 H/8
5.5 - 5 I/9
6 10/0 4 J/10
6.5 - 3 K/10 1/2
7 - 2 -
8 - 0 L/11
9 - 00 M/13
10 - 000 N/15