| US / Canada | UK / Australia | EU / France | Japan / China | Diameter (mm) |
|---|---|---|---|---|
| 4 | H | 47 | 7 | 14.9 |
| 4.5 | I | 48 | 8 | 15.3 |
| 5 | J½ | 49–50 | 9 | 15.7 |
| 5.5 | K½ | 51 | 10 | 16.1 |
| 6 | L½ | 52 | 12 | 16.5 |
| 6.5 | M½ | 53–54 | 13 | 16.9 |
| 7 | N½ | 55–56 | 14 | 17.3 |
| 7.5 | O½ | 57 | 15 | 17.7 |
| 8 | P½ | 58–59 | 16 | 18.2 |
| 8.5 | Q½ | 59–60 | 17 | 18.6 |
| 9 | R½ | 60–61 | 18 | 19.0 |
| 9.5 | S½ | 61–62 | 19 | 19.4 |
| 10 | T½ | 63 | 20 | 19.8 |