HRP Ring Size Guide
HRP Size | Small | Medium | Large | X Large |
Internal Diameter (mm) | 16.79 | 17.58 | 18.76 | 19.94 |
Internal Circumference (mm) | 52.56 | 55.00 | 59.00 | 62.52 |
British UK | M | O | R | U |
Europe | 12.56 | 15 | 19.00 | 22.52 |
Japan | 12 | 15 | 18 | 22 |
USA | 6.25 | 7.25 | 8.75 | 10.25 |