Mares dive boot sizing.
| Size | Mares size code | EU | US | JP |
|---|---|---|---|---|
| 4XS | 030 | 34/35 | 3 | — |
| 3XS | 040 | 35/36 | 4 | — |
| 2XS | 050 | 36/37 | 5 | 23 |
| XS | 060 | 38 | 6 | 24 |
| S | 070 | 39/40 | 7 | 25 |
| M | 080 | 40/41 | 8 | 26 |
| L | 090 | 41/42 | 9 | 27 |
| XL | 100 | 43 | 10 | 28 |
| 2XL | 110 | 44/45 | 11 | 29 |
| 3XL | 120 | 45/46 | 12 | — |
| 4XL | 130 | 47 | 13 | — |
Source: Mares’s size chart.