FERRIS Size Chart
| EU | US | AGE | CM |
| 20 | 4 | 10M -11M | 12.5 |
| 21 | 4.5 | 1 | 13 |
| 22 | 5 | 1 1/2 | 13.5 |
| 23 | 6 | 2 | 14 |
| 24 | 7 | 2 1/2 | 15 |
| 25 | 8 | 3 | 15.5 |
| 26 | 9 | 3 1/2 | 17 |
| 27 | 10 | 4 | 17.5 |
| 28 | 11 | 4-5 | 18 |
| 29 | 12 | 5-6 | 19 |
| 30 | 13 | 6-7 | 19.5 |
*This size chart is intended to provide an approximation. Sizing and fit may vary by shoe style and craftmanship.