Rol Ring — Dimensions
| Ring Size | Circumference (mm) | Diameter (mm) |
| 5 | 49.3 | 15.7 |
| 6 | 51.9 | 16.5 |
| 7 | 54.4 | 17.3 |
| 8 | 57.0 | 18.1 |
| 9 | 59.5 | 19.0 |
| 10 | 62.1 | 19.8 |
| Ring Size | Circumference (mm) | Diameter (mm) |
| 5 | 49.3 | 15.7 |
| 6 | 51.9 | 16.5 |
| 7 | 54.4 | 17.3 |
| 8 | 57.0 | 18.1 |
| 9 | 59.5 | 19.0 |
| 10 | 62.1 | 19.8 |