size-saltwatersandals
| Range | Saltwater Sandals | US | UK | EU | Shoe Insole Length (cm) | Recommended Foot Length (cm) |
| Infant | 3 | 4 | 3 | 19 | 12.5 | 11.5 |
| 4 | 5 | 4 | 20-21 | 13.5 | 12 | |
| 5 | 6 | 5 | 22 | 14.2 | 13 | |
| 6 | 7 | 6 | 23 | 15.2 | 14 | |
| 7 | 8 | 7 | 24 | 16 | 14.5 | |
| 8 | 9 | 8 | 25 | 17 | 15.5 | |
| Child | 9 | 10 | 9 | 26-27 | 17.5 | 16.5 |
| 10 | 11 | 10 | 28 | 18.5 | 17 | |
| 11 | 12 | 11 | 9 | 19.5 | 18 | |
| 12 | 13 | 12 | 30-31 | 20 | 19 | |
| Youth | 13 | 1 | 13 | 32 | 21 | 19.5 |
| 1 | 2 | 1 | 33 | 21.5 | 20.5 | |
| 2 | 3 | 2 | 34 | 22.5 | 21.5 | |
| Y3 | W5 | 3 | 35 | 23.5 | 22 | |
| Adult | 4 | W6 | 3.5 | 36 | 24 | 22.5 |
| 5 | W7 | 4.5 | 37 | 24.5 | 23.5 | |
| 6 | W8 | 5.5 | 38 | 25 | 24 | |
| 7 | W9 | 6.5 | 39 | 26 | 25 | |
| 8 | W10 | 7.5 | 40-41 | 27 | 26 | |
| 9 | W11 | 8.5 | 41-42 | 28 | 26.5 |