Prepare a strip
Cut a narrow strip of paper or use a piece of non-stretch string.
Find your perfect fit
Use this guide to find your UK ring size.
Measure your finger
Wrap it snugly around the base of the finger. Mark where the ends meet.
Compare the length
Measure the marked length in millimetres and compare it with the circumference column.
UK ring size chart
| UK size | Inner diameter | Finger circumference |
|---|---|---|
| J | 15.7 mm | 49.3 mm |
| K | 16.1 mm | 50.6 mm |
| L | 16.5 mm | 51.9 mm |
| M | 16.9 mm | 53.1 mm |
| N | 17.3 mm | 54.4 mm |
| O | 17.7 mm | 55.7 mm |
| P | 18.1 mm | 57.0 mm |
| Q | 18.5 mm | 58.3 mm |
| R | 18.9 mm | 59.5 mm |
| S | 19.4 mm | 60.8 mm |
| T | 19.8 mm | 62.1 mm |
| U | 20.2 mm | 63.4 mm |
Between sizes? I recommend choosing the larger size. If possible, compare with a ring that already fits the intended finger.