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Ring Size Chart
| Size measurement per Country | Length (mm) | |||||||
| USA | AUS / UK | JPN | GER / RU | FR | CH/ES | CN | Perimeter | Diameter |
| 4 | H 1/2 | 7 | 15 | 46 1/2 | 7 | 7 | 46.68 | 14.86 |
| 5 | J 1/2 | 9 | 15.75 | 49 | 9 | 9 | 49.3 | 15.7 |
| 6 | M | 12 | 16.5 | 51.5 | 11.5 | 12 | 51.8 | 16.5 |
| 7 | O | 14 | 17.25 | 54 | 14 | 14 | 54.4 | 17.3 |
| 8 | Q | 16 | 18 | 56.5 | 16 | 16 | 56.9 | 18.1 |
| 9 | R 3/4 | 18 | 19 | 59 | 18 | 18 | 59.5 | 18.9 |
| 10 | T 1/2 | 20 | 20 | 61.5 | 20 | 20 | 62.1 | 19.8 |
| 11 | V 1/2 | 23 | 20.75 | 64 | 23 | 23 | 64.6 | 20.6 |
| 12 | Y | 25 | 21.25 | 66.5 | 25 | 25 | 67.2 | 21.4 |
