Size Chart (Aries RG2) — Order a half size up
| US SIZE (Men's) | US SIZE (Women's) | LENGTH x WIDTH (cm) | LENGTH x WIDTH (in) |
| 5 | 6.5 | 24.1 x 8.3 | 9 1/2 x 3 1/4 |
| 5.5 | 7 | 24.6 x 8.4 | 9 11/16 x 3 5/16 |
| 6 | 7.5 | 25.0 x 8.5 | 9 13/16 x 3 5/16 |
| 6.5 | 8 | 25.4 x 8.6 | 9 15/16 x 3 3/8 |
| 7 | 8.5 | 25.8 x 8.7 | 10 1/8 x 3 7/16 |
| 7.5 | 9 | 26.3 x 8.8 | 10 5/16 x 3 1/2 |
| 8 | 9.5 | 26.7 x 8.9 | 10 8/16 x 3 9/16 |
| 8.5 | 10 | 27.1 x 9.0 | 10 11/16 x 3 9/16 |
| 9 | 10.5 | 27.5 x 9.1 | 10 7/8 x 3 5/8 |
| 9.5 | 11 | 27.9 x 9.2 | 1 1 x 3 5/8 |
| 10 | 11.5 | 2 8.4 x 9.3 | 1 1 3/16 x 3 11/16 |
| 10.5 | 12 | 2 8.8 x 9.4 | 11 5/16 x 3 11/16 |
| 11 | 12.5 | 2 9.2 x 9.5 | 1 1 1/2 x 3 3/4 |
| 11.5 | 13 | 2 9.7 x 9.6 | 1 1 11/16 x 3 13/16 |
| 12 | 13.5 | 30.5 x 9.8 | 12 x 3 7/8 |
| 13 | 14.5 | 31.3 x 10.0 | 12 5/16 x 3 15/16 |
| 14 | 15.5 | 32.2 x 10.3 | 12 11/16 x 4 1/ 16 |