Size Chart
| Xsmall | 14-16 cm | (Women's Standard Form) |
| Small | 16-18 cm | (Women Relax and Men Slim Form) |
| Medium | 18-20 cm | (Men's Standard Form) |
| Large | 20-22 cm | (Men Relax Form) |
RING
| US SIZE | INSIDE (mm, inches) | INT SIZE |
| 7 | 54.3 mm | 14 |
| 7.5 | 55.6 mm | 15 |
| 8 | 57 mm | 16 |
| 8.5 | 58.3 mm | 17 |
| 9 | 59.3 mm | 18 |
| 9.5 | 60.3 mm | 19 |
| 10 | 62.1 mm | 20 |
| 10.5 | 63.4 mm | 22 |
| 11 | 64.5 mm (Men's Standard Form) | 23 |
| 11.5 | 65.9 mm | 24 |
| 12 | 67.2 mm | 25 |
| 12.5 | 68.5 mm | 26 |
| 13 | 69.7 mm | 27 |