| UK Size | US Size | EU Size | Foot Length (cm) |
| 3J | 4 | 21 | 10.8-11.2 |
| 4J | 5 | 22 | 11.2-12.1 |
| 5J | 6 | 23 | 12.1-12.9 |
| 6J | 7 | 24 | 12.9-13.8 |
| 7J | 8 | 25 | 13.8-14.6 |
| 8J | 9 | 26 | 14.6-15.5 |
| 9J | 10 | 27 | 15.5-16.3 |
| 10J | 11 | 28 | 16.3-17.1 |
| 11J | 12 | 29 | 17.1-18 |
| 11.5J | 12.5 | 30 | 18-18.4 |
| 12J | 13 | 31 | 18.4-18.8 |
| 13J | 1 | 32 | 18.8-19.7 |
| 1 | 2 | 33 | 19.7-20.5 |
| 2 | 3 | 34 | 20.5-21.3 |
| 3 | 4 | 35 | 21.3-22.2 |
| 3.5 | 4.5 |
36 | 22.2-22.6 |
| 4 | 5 | 37 | 22.6-23.1 |
| 5 | 6 | 38 | 23.1-23.9 |
| 6 | 7 | 39 | 23.9-24.7 |
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