Sizechart
| US Size | UK Size | EU Size | Diameter (mm) | Circumference (mm) | Japan | Switzerland |
|---|---|---|---|---|---|---|
| 3 | F | 44 | 14.1 | 44.2 | 4 | 4 |
| 3.5 | G | 45 | 14.5 | 45.5 | 5 | 5.5 |
| 4 | H½ | 46.5 | 14.9 | 46.8 | 6 | 6.75 |
| 4.5 | I½ | 47.5 | 15.3 | 48.0 | 7 | 8 |
| 5 | J½ | 49 | 15.7 | 49.3 | 9 | 9.25 |
| 5.5 | K½ | 50 | 16.1 | 50.6 | 10 | 10.5 |
| 6 | L½ | 51.5 | 16.5 | 51.8 | 11 | 11.75 |
| 6.5 | M½ | 52.5 | 16.9 | 53.1 | 13 | 13 |
| 7 | N½ | 54 | 17.3 | 54.4 | 14 | 14.25 |
| 7.5 | O½ | 55 | 17.7 | 55.7 | 15 | 15.5 |
| 8 | P½ | 56.5 | 18.1 | 57.0 | 16 | 16.75 |
| 8.5 | Q½ | 58 | 18.5 | 58.3 | 17 | 18 |
| 9 | R½ | 59 | 18.9 | 59.5 | 18 | 19.25 |
| 9.5 | S½ | 60.5 | 19.3 | 60.8 | 20 | 20.5 |
| 10 | T½ | 62 | 19.7 | 62.1 | 21 | 21.75 |
| 10.5 | U½ | 63 | 20.1 | 63.4 | 22 | 23 |
| 11 | V½ | 64.5 | 20.5 | 64.6 | 23 | 24.25 |
| 11.5 | W½ | 66 | 20.9 | 65.9 | 24 | 25.5 |
| 12 | Y | 67.5 | 21.3 | 67.2 | 25 | 26.75 |
| 12.5 | Z | 68.5 | 21.7 | 68.5 | 26 | 28 |
| 13 | Z½ | 70 | 22.1 | 69.7 | 27 | 29.25 |
