Size Guide
Please refer to the size guide for regional size conversions below.
Ring size standards vary depending on the brand and country. Please note that the comfort and fit of the ring can vary based on its width, thickness, and design.
If you have any questions or concerns about choosing the right size for you, please contact us at online@shiharalab.com before placing an order.
| JP |
Inside Dia.(mm) |
Inside Circ.(mm) |
US | UK | FR |
| 1 | 13.0 | 40.8 | 1 | C | 41 |
| 2 | 13.4 | 41.9 | 2 | D | 42 |
| 3 | 13.7 | 42.9 | 2.5 | E | 43 |
| 4 | 14.0 | 44.0 | 3 | F | 44 |
| 5 | 14.4 | 45.0 | 3.5 | G | 45 |
| 6 | 14.7 | 46.1 | 3.5-4 | G-H | 46 |
| 7 | 15.0 | 47.1 | 4-4.5 | H-I | 47 |
| 8 | 15.4 | 48.2 | 4.5-5 | I-J | 48 |
| 9 | 15.7 | 49.2 | 5 | J | 49 |
| 10 | 16.0 | 50.3 | 5.5 | K | 50 |
| 11 | 16.4 | 51.3 | 6 | L | 51 |
| 12 | 16.7 | 52.4 | 6.5 | L-M | 52 |
| 13 | 17.0 | 53.4 | 6.5-7 | M-N | 53 |
| 14 | 17.4 | 54.5 | 7-7.5 | N-O | 54 |
| 15 | 17.7 | 55.5 | 7.5-8 | O-P | 55 |
| 16 | 18.0 | 56.6 | 8 | P | 56 |
| 17 | 18.4 | 57.6 | 8.5 | Q | 57 |
| 18 | 18.7 | 58.6 | 9 | R | 58 |
| 19 | 19.0 | 59.7 | 9.5 | S | 59 |
| 20 | 19.4 | 60.7 | 10 | T | 60 |
| 21 | 19.7 | 61.8 | 10-10.5 | T-U | 61 |
| 22 | 20.0 | 62.8 | 10.5 | U | 62 |
| 23 | 20.4 | 63.9 | 11 | V | 63 |
| 24 | 20.7 | 64.9 | 11.5 | W | 64 |
| 25 | 21.0 | 66.0 | 12 | X | 65 |
| 26 | 21.4 | 67.0 | 12.5 | Y | 66 |
| 27 | 21.7 | 68.0 | 13 | Z | 67 |
| 28 | 22.0 | 69.0 | 13.5 | 68 |