| INSOLE | AGE | EURO | UK | US | Outsole |
| 12.5 | 9-12 Months | 21 | 4.5 | 5.5 | 15 |
| 13 | 12-15 Months | 22 | 5 | 6 | 15.5 |
| 13.5 | 15-18 Months | 22 | 5.5 | 6.5 | 16 |
| 14 | 18-24 Months | 23 | 6 | 7 | 16.5 |
| 14.5 | 2 Years | 24 | 7 | 8 | 17 |
| 15 | 2-2.5 Years | 25 | 7.5 | 8.5 | 17.5 |
| 15.5 | 2.5-3 Years | 25 | 8 | 9 | 18 |
| 16 | 3-3.5 Years | 26 | 8.5 | 9.5 | 18.5 |
| 16.5 | 3.5-4 Years | 27 | 9 | 10 | 19 |
| 17 | 4-4.5 Years | 28 | 10 | 11 | 19.5 |