International Crochet Hook Sizes
Our hook selection page
| Metric (mm) Sizes | UK/Canadian Sizes | United States Sizes |
|---|---|---|
| 3.75 | 9 | F-5 |
| 4.00 | 8 | G-6 |
| 4.50 | 7 | 7 |
| 5.00 | 6 | H-8 |
| 5.50 | 5 | I-9 |
| 6.00 | 4 | J-10 |
| 6.50 | 3 | 10-1/4 |
| 7.00 | 2 | K-10-1/2 |
| 7.50 | 1 | n/a |
| 8.00 | 0 | n/a |
| 9.00 | 00 | n/a |
| 10.00 | 000 | n/a |