There is really no substitute for getting your fingers properly measured with a ring gauge by a jeweller, that way you can be absolutely certain what your ring size is. You can measure round your finger with a piece of thread and then measure the length with a ruler but it really isn't very accurate and rings need to fit well or they are just annoying to wear!
This can be a very confusing area, especially if you are buying from outside the UK. A brief guide to the most common ring sizes is given below. If you want to check out another size please mail me.
| UK | US | MM |
|---|---|---|
| L | 5 3/4 | 51.2 |
| M | 6 1/4 | 52.5 |
| N | 6 3/4 | 53.8 |
| O | 7 1/4 | 55 |
| P | 7 3/4 | 56.3 |
| Q | 8 1/4 | 57.6 |
| R | 8 3/4 | 58.9 |
| S | 9 1/4 | 60.1 |
| T | 9 3/4 | 61.4 |