UK ring sizes use letters, with half sizes in between. Use the chart below to convert a measurement of your finger or of a ring you already wear into a UK size. Measurements are approximate; if you are between sizes, choose the larger size.
UK ring size chart
| UK size | Inside circumference (mm) | Inside diameter (mm) |
|---|---|---|
| F | 44.2 | 14.1 |
| G | 45.5 | 14.5 |
| H | 46.8 | 14.9 |
| I | 48.0 | 15.3 |
| J | 49.3 | 15.7 |
| K | 50.6 | 16.1 |
| L | 51.9 | 16.5 |
| M | 53.1 | 16.9 |
| N | 54.4 | 17.3 |
| O | 55.7 | 17.7 |
| P | 57.0 | 18.1 |
| Q | 58.3 | 18.6 |
| R | 59.5 | 18.9 |
| S | 60.8 | 19.4 |
| T | 62.1 | 19.8 |
| U | 63.4 | 20.2 |
| V | 64.6 | 20.6 |
| W | 65.9 | 21.0 |
| X | 67.2 | 21.4 |
| Y | 68.5 | 21.8 |
| Z | 69.7 | 22.2 |
How to measure
- Using a ring you already wear: measure the inside diameter across the widest point and find the closest match in the diameter column.
- Using your finger: wrap a thin strip of paper around the base of the finger, mark where it overlaps, lay it flat and measure the length. Find the closest match in the circumference column.
Tips for a comfortable fit
- Measure at the end of the day, when fingers are at their largest, and not when your hands are cold.
- Make sure the ring will still pass over your knuckle.
- For wide bands (6mm and over), consider going up half a size.
Not sure? Visit our Hatton Garden showroom to be measured professionally, or read how to find your ring size at home. If your ring does not fit, see our resizing and returns policy.