Select the perfect ring size with our ring size guide
Whether you're buying a ring as a special treat for yourself or a gift for someone else, we understand that getting the ring size right is important. This helpful ring size guide includes a ring size conversion chart and tips on how to measure the ring size. Plus, sign up to our newsletter to receive a free ring sizer card in the post.
Ring size conversion chart
| Inside diameter | Inside circumference | UK ring size | US ring size | European ring size | |
|---|---|---|---|---|---|
| XX Small | 13.7 mm | 42.9 mm | E | 2.75 | 42.75 |
| 14.1 mm | 44.2 mm | F | 3 | 44.5 | |
| X Small | 14.5 mm | 45.5 mm | G | 3.5 | 45.25 |
| 14.9 mm | 46.8 mm | H | 4 | 46.5 | |
| Small | 15.3 mm | 48.0 mm | I | 4.5 | 47.125 |
| 15.5 mm | 48.7 mm | J | 4.75 | 48.375 | |
| 15.9 mm | 50.0 mm | K | 5.25 | 49.625 | |
| Medium | 16.3 mm | 51.2 mm | L | 5.75 | 50.875 |
| 16.7 mm | 52.5 mm | M | 6.25 | 52.125 | |
| 17.1 mm | 53.8 mm | N | 6.75 | 53.375 | |
| Large | 17.5 mm | 55.1 mm | O | 7 | 54.625 |
| 17.9 mm | 56.3 mm | P | 7.5 | 55.875 | |
| 18.3 mm | 57.6 mm | Q | 8 | 57.125 | |
| 18.8 mm | 58.9 mm | R | 8.5 | 58.375 | |
| X Large | 19.2 mm | 60.2 mm | S | 9 | 59.625 |
| 19.6 mm | 61.4 mm | T | 9.75 | 60.875 | |
| 20.0 mm | 62.7 mm | U | 10.25 | 62.125 | |
| 20.4 mm | 64.0 mm | V | 10.75 | 63.375 | |
| XX Large | 20.8 mm | 65.3 mm | W | 11.25 | 64/625 |
| 21.2 mm | 66.6 mm | X | 11.75 | 65.875 | |
| 21.6 mm | 67.8 mm | Y | 12 | 67.125 | |
| 21.8 mm | 68.5 mm | Z | 12.5 | 67.75 |
