Please find sizing specific to Nike below:
UNISEX
| US MENS | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| US WOMENS | 5.5 | 6.5 | 7.5 | 8.5 | 9.5 | 10.5 | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 |
| UK | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| EU | 36 | 37 | 38 | 40 | 41 | 42.5 | 44 | 45 | 46 | 47.5 | 48.5 |
MEN
| US | 5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 15 |
| UK | 4 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 14 |
| EU | 37 | 38 | 38.5 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 45.5 | 46 | 47 | 47.5 | 48 | 48.5 | 49.5 |
WOMEN
| US | 4 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 |
| UK | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10.5 |
| EU | 35 | 35.5 | 36 | 36.5 | 37.5 | 38 | 38.5 | 39 | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45.5 |
KIDS - YOUTH
| US | 1 | 1.5 | 2 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 8 | 9 | 10 | 10.5 | 11 | 12 | 13 |
| UK | 13.5 | 1 | 1.5 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7.5 | 8.5 | 9.5 | 10 | 10.5 | 11.5 | 12.5 |
| EU | 32 | 33 | 33.5 | 35 | 35.5 | 36 | 36.5 | 37.5 | 38 | 38.5 | 39 | 40 | 41 | 42.5 | 27 | 27.5 | 28 | 29.5 | 31 |
KIDS - TODDLER
| US | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| UK | 3.5 | 4.5 | 5.5 | 6.5 | 7.5 | 8.5 | 9.5 |
| EU | 19.5 | 21 | 22 | 23.5 | 25 | 26 | 27 |