RBK skates are relatively large in sizing.
3 differents widths are available (depends on model):
Width C: more narrow than standard
Width D: standard width
Width E: wider than standard
If nothing else is stated, the RBK skate is with standard width.
Kids sizes
| Footlenght (mm) | Size (EU) | Size (UK) |
| 161 | 25,5 | 8,5 |
| 165 | 26 | 9 |
| 169 | 26,5 | 9,5 |
| 173 | 27 | 10 |
| 177 | 27,5 | 10,5 |
| 181 | 28 | 11 |
| 185 | 29 | 11,5 |
| 189 | 30 | 12 |
| 193 | 30,5 | 12,5 |
| 197 | 31 | 13 |
| 201 | 31,5 | 13,5 |
| 205 | 32 | 1 |
Junior and women sizes
| Footlenght (mm) | Size (EU) | Size (UK) |
| 209 | 32,5 | 1,5 |
| 213 | 33 | 2 |
| 217 | 34 | 2,5 |
| 221 | 34,5 | 3 |
| 225 | 35 | 3,5 |
| 230 | 36 | 4 |
| 234 | 36,5 | 4,5 |
| 238 | 37,5 | 5 |
| 242 | 38,5 | 5,5 |
| 248 | 39 | 6 |
Senior and mens sizes
| Footlenght (mm) | Size (EU) | Size (UK) |
| 252 | 40 | 6,5 |
| 256 | 40,5 | 7 |
| 260 | 41 | 7,5 |
| 265 | 42 | 8 |
| 269 | 42,5 | 8,5 |
| 273 | 43 | 9 |
| 277 | 44 | 9,5 |
| 281 | 44,5 | 10 |
| 286 | 45 | 10,5 |
| 290 | 45,5 | 11 |
| 294 | 46 | 11,5 |
| 298 | 47 | 12 |
| 303 | 48 | 12,5 |
| 307 | 48,5 | 13 |
| 312 | 49 | 13,5 |
| 316 | 50 | 14 |
| 320 | 51 | 14,5 |
| 324 | 52 | 15 |
