| US | UK | EU | JP |
| 7 | 6 | 40 | 25 |
| 8 | 7 | 40.5 | 26 |
| 8.5 | 7.5 | 41 | 26.5 |
| 9 | 8 | 42 | 27 |
| 9.5 | 8.5 | 42.5 | 27.5 |
| 10 | 9 | 43 | 28 |
| 10.5 | 9.5 | 43.5 | 28.5 |
| 11 | 10 | 44 | 29 |
| 11.5 | 10.5 | 44.5 | 29.5 |
| 12 | 11 | 45 | 30 |
| 13 | 12 | 46 | 30.5 |
| 14 | 13 | 47.5 | 31.5 |
| US | UK | EU | JP |
| 5 | 3 | 35.5 | 22 |
| 5.5 | 3.5 | 36 | 22.5 |
| 6 | 4 | 36.5 | 23 |
| 6.5 | 4.5 | 37 | 23.5 |
| 7 | 5 | 37.5 | 24 |
| 7.5 | 5.5 | 38 | 24.5 |
| 8 | 6 | 38.5 | 25 |
| 8.5 | 6.5 | 39 | 25.5 |
| 9 | 7 | 40 | 26 |
| 9.5 | 7.5 | 41 | 26.5 |
| 10 | 8 | 42 | 27 |
| 11 | 9 | 42.5 | 28 |
| Approximate Age | Length (Inches) | US | UK | Europe |
| 0-12 Months | 3.75" | 2 | 1 | 17 |
| 0-12 Months | 4.5" | 4 | 3 | 19 |
| 0-12 Months | 4.75" | 5 | 4 | 20 |
| 12-18 Months | 5.125" | 6 | 5 | 22 |
| 18-24 Months | 5.5" | 7 | 6 | 23 |
| 24 Months-3 Years | 5.75" | 8 | 7 | 24 |
| 24 Months-3 Years | 6.125" | 9 | 8 | 25 |
| 3-4 Years | 6.5" | 10 | 9 | 27 |