Ring Size Guide
To obtain the most accurate measurement of your finger, measure at room temperature, when your hands are not unusually cold.
Alternatively, to work out your size from an existing ring, measure the ring using our sizing guide below.
| DIAMETER |
CIRCUMFERENCE |
||||
|
MM |
MM |
UK |
US |
JP |
SWISS |
| 15.3 | 48 | I | 4.5 | 8 | |
| 15.5 | 48.7 | J | 4.75 | 9 | |
| 15.9 | 49.9 | K | 5.25 | 10 | |
| 16.3 | 51.2 | L | 5.75 | 11.75 | |
| 16.7 | 52.5 | M | 6.25 | 12 | |
| 17.1 | 53.8 | N | 6.75 | ||
| 17.5 | 55 | O | 7.25 | ||
| 17.9 | 56.3 | P | 7.75 | ||
| 18.3 | 57.6 | Q | 8.25 | ||
| 18.7 | 58.9 | R | 8.75 | 19 | |
| 19.2 | 60.1 | S | 9.25 | 20.25 | |
| 19.6 | 61.4 | T | 9.75 | 21.5 | |
| 20 | 62.7 | U | 10.25 | 21 | |
| 20.4 | 64 | V | 10.75 | ||
| 20.8 | 65.2 | W | 11.25 | 25 | |
| 21.2 | 66.5 | X | 11.75 | ||
| 21.6 | 67.8 | Y | 12.25 | ||
| 21.8 | 68.4 | Z | 12.5 | ||