EF Barefoot Size Guide
| Size | Inner length | Inner width |
| 26 | 16.8 | 7.1 |
| 27 | 17.5 | 7.3 |
| 28 | 17.9 | 7.4 |
| 29 | 18.8 | 7.6 |
| 30 | 19.5 | 7.7 |
| 31 | 20.0 | 7.8 |
| 32 | 20.8 | 8.0 |
| 33 | 21.5 | 8.1 |
| Size | Inner length | Inner width |
| 26 | 16.8 | 7.1 |
| 27 | 17.5 | 7.3 |
| 28 | 17.9 | 7.4 |
| 29 | 18.8 | 7.6 |
| 30 | 19.5 | 7.7 |
| 31 | 20.0 | 7.8 |
| 32 | 20.8 | 8.0 |
| 33 | 21.5 | 8.1 |