| Metric size (mm) | U.S. size | UK/Canadian size | Japanese size |
| 2.0 | 0 | 14 | |
| 2.1 | 0 | ||
| 2.25 | 1 | 13 | |
| 2.4 | 1 | ||
| 2.5 | |||
| 2.7 | 2 | ||
| 2.75 | 2 | 12 | |
| 3.0 | 11 | 3 | |
| 3.25 | 3 | 10 | |
| 3.3 | 4 | ||
| 3.5 | 4 | ||
| 3.6 | 5 | ||
| 3.75 | 5 | 9 | |
| 3.9 | 6 | ||
| 4.0 | 6 | 8 | |
| 4.2 | 7 | ||
| 4.5 | 7 | 7 | 8 |
| 4.8 | 9 | ||
| 5.0 | 8 | 6 | |
| 5.1 | 10 | ||
| 5.4 | 11 | ||
| 5.5 | 9 | 5 | |
| 5.7 | 12 | ||
| 6.0 | 10 | 4 | 13 |
| 6.3 | 14 | ||
| 6.5 | 10 ? | 3 | |
| 6.6 | 15 | ||
| 7.0 | 2 | 7 mm | |
| 7.5 | 1 | ||
| 8.0 | 11 | 0 | 8 mm |
| 9.0 | 13 | 00 | 9 mm |
| 10.0 | 15 | 000 | 10 mm |
| 12.0 | 17 | ||
| 16.0 | 19 | ||
| 19.0 | 25 | ||
| 25.0 | 50 |
