Ring sizes
Most of our rings are single pieces in a fixed size. Measure first; the table converts between UK letters, US numbers and millimetres.
Measure a ring you own
Lay a ring that fits the right finger on a ruler and read the inside diameter in millimetres, edge to edge. Find that number in the diameter column.
Or measure the finger
Wrap a thin strip of paper around the base of the finger, mark the overlap and measure the length. That is the circumference. Measure at the end of the day and never when your hands are cold. If your knuckle is wide, measure it too and choose a size in between.
| UK | US | Inside diameter (mm) | Circumference (mm) |
|---|---|---|---|
| F | 3 | 14.1 | 44.2 |
| G | 3.5 | 14.5 | 45.5 |
| H | 4 | 14.9 | 46.8 |
| I | 4.5 | 15.3 | 48.0 |
| J | 5 | 15.7 | 49.3 |
| K | 5.5 | 16.1 | 50.6 |
| L | 6 | 16.5 | 51.9 |
| M | 6.5 | 16.9 | 53.1 |
| N | 7 | 17.3 | 54.4 |
| O | 7.5 | 17.7 | 55.7 |
| P | 8 | 18.1 | 57.0 |
| Q | 8.5 | 18.5 | 58.3 |
| R | 9 | 18.9 | 59.5 |
| S | 9.5 | 19.4 | 60.8 |
| T | 10 | 19.8 | 62.1 |
| U | 10.5 | 20.2 | 63.4 |
| V | 11 | 20.6 | 64.6 |
| W | 11.5 | 21.0 | 65.9 |
| X | 12 | 21.4 | 67.2 |
Wide bands
A band wider than five millimetres feels tighter than a slim ring in the same size. Go up half a size.
Still unsure? Write to us with the piece you are looking at and we will help.