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Wrong sizing is the top reason for returns on water shoes sold online. Use this table to plan your size run, then confirm with the size chart of the exact model — every last and sole is slightly different.
Adult sizes
| EU | US women | US men | UK |
|---|---|---|---|
| 35 | 5 | — | 2.5 |
| 36 | 5.5–6 | — | 3.5 |
| 37 | 6.5 | — | 4 |
| 38 | 7.5 | 6 | 5 |
| 39 | 8 | 6.5 | 6 |
| 40 | 9 | 7 | 6.5 |
| 41 | 9.5 | 8 | 7.5 |
| 42 | 10 | 8.5 | 8 |
| 43 | — | 9.5 | 9 |
| 44 | — | 10 | 9.5 |
| 45 | — | 11 | 10.5 |
| 46 | — | 12 | 11 |
| 47 | — | 12.5–13 | 12 |
Kids sizes
| EU | US | UK |
|---|---|---|
| 24 | 8C | 7 |
| 26 | 9.5C | 8.5 |
| 28 | 11C | 10 |
| 30 | 12.5C | 11.5 |
| 32 | 1Y | 13 |
| 34 | 2.5Y | 1.5 |
| 36 | 4Y | 3 |
Approximate values; brands differ. Ask us for the size chart (insole length per size) of each model.
How the main types fit
- Aqua socks stretch, so many sellers list them in double sizes (for example 36/37) to keep the size run short.
- Barefoot water shoes have a wide toe area and a thin sole; most buyers order their normal size.
- Knit sock styles stretch around the foot but not in length — size by insole length.
- Kids styles with hook-and-loop straps adjust to narrow and wide feet, which helps with returns.
Our adult styles run from EU 34/35 up to EU 46–49 depending on the model, and kids styles from EU 24 to EU 37. See the size range on each product page.