Find your perfect fit
Determine your ring size
Our rings come in UK letter sizes. Use one of these simple methods at home, then find your size in the chart below.
- 1
Measure a ring you own
Choose a ring that fits the finger you're buying for. Measure straight across the inside, edge to edge, in millimetres.
Match that number to the inside diameter column in the chart.
- 2
Measure your finger
Wrap a thin strip of paper or string around the base of your finger. Mark where it meets, then measure the length in millimetres.
Match that number to the circumference column.
- 3
Use a ring sizer
Any high-street jeweller can measure you for free in a few seconds.
Ring size chart
Find the measurement closest to yours. If you're between two sizes, choose the larger one.
| UK size | US size | Inside diameter (mm) | Circumference (mm) |
|---|---|---|---|
| H | 3¾ | 14.7 | 46.0 |
| I | 4¼ | 15.0 | 47.3 |
| J | 4⅝ | 15.4 | 48.4 |
| K | 5⅛ | 15.8 | 49.6 |
| L | 5½ | 16.1 | 50.6 |
| M | 6 | 16.5 | 51.9 |
| N | 6½ | 16.9 | 53.2 |
| O | 7 | 17.4 | 54.5 |
| P | 7½ | 17.8 | 55.8 |
| Q | 8 | 18.2 | 57.2 |
| R | 8⅝ | 18.6 | 58.5 |
| S | 9⅛ | 19.1 | 60.0 |
| T | 9⅝ | 19.5 | 61.3 |
| U | 10¼ | 20.0 | 62.9 |
| V | 10⅝ | 20.3 | 63.8 |
| W | 11⅛ | 20.8 | 65.2 |
EU ring sizes match the circumference in millimetres. Charts vary slightly between brands, so if you're unsure, measure a ring that already fits you well.
Prefer to print?
Download our printable guide with ring circles and a cut-out finger sizer. Print at 100% on A4 paper.