Sizing: RSX-FTR
| Insole Length | US Size | EU Size | UK Size |
| 205 mm | 1 | 32 | 13 |
| 213 mm | 2 | 33.5 | 1 |
| 221 mm | 3 | 35 | 2 |
| 229 mm | 4 | 36 | 3 |
| 238 mm | 5 | 37.5 | 4 |
| Insole Length | US Size | EU Size | UK Size |
| 205 mm | 1 | 32 | 13 |
| 213 mm | 2 | 33.5 | 1 |
| 221 mm | 3 | 35 | 2 |
| 229 mm | 4 | 36 | 3 |
| 238 mm | 5 | 37.5 | 4 |