INTERNATIONAL SIZE CONVERSION
Ring Size Guide
Use this chart to compare European, UK, US, and Japanese ring sizes. Sizing may vary slightly by country and brand, so international conversions should be used as a guide.
Our rings feature an open cuff design and fit larger than standard closed rings. Please order one Japanese size smaller than the size you usually wear. For example, if you normally wear JP 12, please choose JP 11.
| EUROPE | UK | US | JAPAN | INNER CIRCUMFERENCE (mm)CIRC. (mm) |
|---|---|---|---|---|
| 40 | — | — | JP 0 | 40.0 |
| 41 | — | — | JP 1 | 41.0 |
| 42 | — | — | JP 2 | 42.0 |
| 43 | — | — | JP 3 | 43.0 |
| 44 | F½ | 3 | JP 4 | 44.0 |
| 45 | G | 3¼ | JP 5 | 45.0 |
| 46 | H | 3¾ | JP 6 | 46.0 |
| 47 | H½ | 4 | JP 7 | 47.0 |
| 48 | I½ | 4½ | JP 8 | 48.0 |
| 49 | J½ | 4¾ | JP 9 | 49.0 |
| 50 | K | 5¼ | JP 10 | 50.0 |
| 51 | L | 5¾ | JP 11 | 51.0 |
| 52 | L½ | 6 | JP 12 | 52.0 |
| 53 | M½ | 6¼ | JP 13 | 53.0 |
| 54 | N½ | 6¾ | JP 14 | 54.0 |
| 55 | O | 7¼ | JP 15 | 55.0 |
| 56 | P | 7½ | JP 16 | 56.0 |
| 57 | P½ | 8 | JP 17 | 57.0 |
| 58 | Q½ | 8¼ | JP 18 | 58.0 |
| 59 | R | 8¾ | JP 19 | 59.0 |
| 60 | S | 9 | JP 20 | 60.0 |
| 61 | S½ | 9½ | JP 21 | 61.0 |
| 62 | T½ | 10 | JP 22 | 62.0 |
| 63 | U½ | 10¼ | JP 23 | 63.0 |
| 64 | V | 10¾ | JP 24 | 64.0 |
| 65 | W | 11 | JP 25 | 65.0 |
| 66 | W½ | 11½ | JP 26 | 66.0 |
| 67 | X½ | 11¾ | JP 27 | 67.0 |
| 68 | Z | 12¼ | JP 28 | 68.0 |
| 69 | Z½ | 12½ | JP 29 | 69.0 |
| 70 | — | 13 | JP 30 | 70.0 |
About the conversion
European sizing corresponds to the ring's inner circumference in millimetres. International size conversions are approximate and may vary slightly by country, brand, and sizing standard.