Reef Men
| Maat US | Lengte in cm | Maat EU |
| 4 | 22cm | 34/35 |
| 5 | 23cm | 36 |
| 6 | 24cm | 37/38 |
| 7 | 25cm | 39 |
| 8 | 26cm | 40 |
| 9 | 27,5cm | 41/42 |
| 10 | 28,25cm | 43 |
| 11 | 29cm | 44 |
| 12 | 30cm | 45 |
| 13 | 31cm | 46 |
| 14 | 32cm | 47 |
| 15 | 33cm | 48 |
Reef Girls
| Maat US | Lengte in cm | Maat EU |
| 5 | 22cm | 34/35 |
| 6 | 23cm | 36 |
| 7 | 24cm | 37/38 |
| 8 | 25cm | 39 |
| 9 | 26cm | 40 |
| 10 | 27cm | 41/42 |
Reef Kids
| Maat US | Lengte in cm | Maat EU |
| 3/4 | 11cm | 19/20 |
| 5/6 | 12,5cm | 21/22 |
| 7/8 | 14,5cm | 23/24 |
| 9/10 | 16cm | 25/26 |
| 11/12 | 18cm | 28/29 |
| 13/1 | 20cm | 31/32 |
| 2/3 | 22cm | 33/34 |
| 4/5 | 22-23cm | 35/36 |
