| Vionic | |||||
| US/AUS | UK | EU | Length (cm) | Width | Vionic Size |
| Women's | |||||
| 5 | 3 | 36 | 21.9 | 5 | |
| 6-6.5 | 4-4.5 | 37-37.5 | 22.8-23.2 | 6 | |
| 7-7.5 | 5-5.5 | 38-38.5 | 23.6-24.1 | 7 | |
| 8-8.5 | 6-6.5 | 39-40 | 24.5-24.9 | 8 | |
| 9-9.5 | 7-7.5 | 41-41.5 | 25.3-25.6 | 9 | |
| 10-10.5 | 8-8.5 | 42-42.5 | 26.2-26.7 | 10 | |
| 11 | 9 | 43 | 27 | 11 | |
| 12 | 10 | 44 | 27.9 | 12 | |
| Men's | |||||
| 7-7.5 | 6-6.5 | 40-40.5 | 24.5-24.9 | 7 | |
| 8-8.5 | 7-7.5 | 41-41.5 | 25.3-25.7 | 8 | |
| 9-9.5 | 8-8.5 | 42-42.5 | 26.1-26.5 | 9 | |
| 10-10.5 | 9-9.5 | 43-43.5 | 27-27.3 | 10 | |
| 11-11.5 | 10.10.5 | 44-44.5 | 27.9-28.3 | 11 | |
| 12 | 11 | 45 | 28.6 | 12 | |
| 13 | 12 | 46 | 29.4 | 13 | |
