Bioworld sizes chart
The manufacturer recommends adding an excess of 0,5 cm to the total length of your foot, which will give you your ideal shoe size.
| UK size | EU size | Length (cm) | Width (cm) |
| 3.5 | 36 | 23,7 | 9,1 |
| 4.5 | 37 | 24,5 | 9.4 |
| 5.5 | 38 | 25,2 | 9,7 |
| 6 | 39 | 25,7 | 9,9 |
| 7 | 40 | 26,3 | 10,1 |
| 8 | 41 | 26,9 | 10,3 |
| 8.5 | 42 | 27,4 | 10,5 |