The size of the ring will vary depending on the thickness and height of the band.
If you have any queries, please feel free to contact us.
| D mm |
C mm |
UK | EU | USA | JPN |
|---|---|---|---|---|---|
| 12.0 | 37.5 | A | - | 0.5 | - |
| 12.4 | 38.9 | B | - | 1 | - |
| 12.8 | 40.2 | C | 41 | 1.5 | 1 |
| 13.2 | 41.5 | D | 41.5 | 2 | 2 |
| 13.6 | 42.8 | E | 42.75 | 2.5 | 3 |
| 14.1 | 44.1 | F | 44 | 3 | 4 |
| 14.4 | 45.1 | G | 45.25 | 3.5 | 5 |
| 14.6 | 45.7 | G 1/2 | - | 3.75 | - |
| 14.7 | 46.0 | H | 46.5 | 4 | 6 |
| 14.9 | 46.7 | H 1/2 | - | 4.25 | - |
| 15.0 | 47.3 | I | 47.75 | 4.5 | 7 |
| 15.3 | 48.0 | I 1/2 | - | - | - |
| 15.4 | 48.4 | J | 49 | 4.75 | 8 |
| 15.7 | 49.3 | J 1/2 | - | 5 | 9 |
| 15.8 | 49.6 | K | 50 | 5.25 | - |
| 16.0 | 50.2 | K 1/2 | - | 5.5 | 10 |
| 16.1 | 51.2 | L | 51.75 | 5.75 | - |
| 16.4 | 51.6 | L 1/2 | - | 6 | 11 |
| 16.5 | 51.9 | M | 52.75 | 6.25 | - |
| 16.7 | 52.5 | M 1/2 | - | 6.5 | 12 |
| 16.9 | 53.2 | N | 54 | 6.75 | 13 |
| 17.1 | 53.8 | N 1/2 | 55 | 7 | 14 |
| 17.4 | 54.5 | O | 55.25 | 7.25 | 14.5 |
| 17.5 | 54.8 | O 1/2 | - | - | - |
| 17.8 | 55.8 | P | 56 | 7.5 | 15 |
| 18.0 | 56.5 | P 1/2 | - | 7.75 | 16 |
| 18.2 | 57.2 | Q | 57 | 8 | - |
| 18.4 | 57.7 | Q 1/2 | - | 8.25 | 17 |
| 18.6 | 58.5 | R | 58 | 8.5 | 18 |
| 19.1 | 60.0 | S | 59 | 9 | 19 |
| 19.3 | 60.6 | S 1/2 | 59.5 | 9.5 | 19.5 |
| 19.5 | 61.3 | T | 60 | 9.75 | 20 |
| 19.8 | 62.3 | T 1/2 | 61 | 10 | 21 |
| 20.0 | 62.9 | U | 62 | 10.25 | 22 |
| 20.2 | 63.5 | U 1/2 | - | 10.5 | - |
| 20.3 | 63.8 | V | 63 | 10.75 | 23 |
| 20.7 | 65.0 | V 1/2 | - | 11 | 24 |
| 20.8 | 65.3 | W | 64 | 11.25 | - |
| 21.2 | 66.5 | X | 65.5 | 12 | 25 |