Size chart and guide for the Original Saltwater Sandals. All measurements are of the sandal inner sole. Please contact customer service at hello@naturebaby.co.nz for further assistance.
| US Size | Insole Measurement (cm) | UK Size | EU Size |
| 4 | 13.8 | 3 | 19 |
| 5 | 14 | 4 | 20/21 |
| 6 | 15 | 5 | 22 |
| 7 | 16 | 6 | 23 |
| 8 | 16.5 | 7 | 24 |
| 9 | 17.5 | 8 | 25 |
| 10 | 18 | 9 | 26/27 |