Needle and Hook Conversion Chart
| Metric sizes (mm) | US sizes | UK/Canadian | US Crochet |
| 2.0 | 0 | 14 | |
| 2.25 | 1 | 13 | B/1 |
| 2.75 | 2 | 12 | C/2 |
| 3.0 | - | 11 | - |
| 3.25 | 3 | 10 | D/3 |
| 3.5 | 4 | - | E/4 |
| 3.75 | 5 | 9 | F/5 |
| 4.0 | 6 | 8 | G/6 |
| 4.5 | 7 | 7 | 7 |
| 5.0 | 8 | 6 | H/8 |
| 5.5 | 9 | 5 | I/9 |
| 6.0 | 10 | 4 | J/10 |
| 6.5 | 10.5 | 3 | K/10.5 |
| 7.0 | - | 2 | - |
| 7.5 | - | 1 | - |
| 8.0 | 11 | 0 | L/11 |
| 9.0 | 13 | 00 | M/13 |
| 10.0 | 15 | 000 | N/15 |
| 12.0 | 17 | - | - |
| 16.0 | 19 | - | - |
| 19.0 | 35 | - | - |
| 25.0 | 50 | - | - |
