RINGS SIZE
| US SIZE | CIRCUMFERENCE (MM) |
|---|---|
| 3.0 | 44.2mm |
| 3.5 | 45.5mm |
| 4.0 | 46.8mm |
| 4.5 | 48mm |
| 5.0 | 49.3mm |
| 5.5 | 50.6mm |
| 6.0 | 51.9mm |
| 6.5 | 53.1mm |
| 7.0 | 54.4mm |
| 7.5 | 55.7mm |
| 8.0 | 57mm |
| 8.5 | 58.3mm |
| 9.0 | 59.5mm |
| 9.5 | 60.8mm |
| 10.0 | 62.1mm |
| 10.5 | 63.4mm |
| 11.0 | 64.6mm |
| 11.5 | 65.9mm |
| 12.0 | 67.2mm |
| 12.5 | 68.5mm |
| 13.0 | 69.7mm |