Ring size guide
Three ways to find the right size, and a chart to convert between systems.
- 1
Measure a ring that fits: lay it on a ruler and read the inside diameter in millimetres.
- 2
Wrap a strip of paper around the base of your finger, mark where it overlaps, and measure the length: that's the circumference.
- 3
Ask us for a free ring sizer: we'll post it to you. Contact us
Measure the inside diameter of a ring that fits the finger it will be worn on, or wrap a strip of paper around the finger and measure its length. Fingers are slightly larger in the evening and when warm.
Size chart
| US | UK | EU (circumference) | Diameter |
|---|---|---|---|
| 3 | F | 44.2 | 14.1 mm |
| 3.5 | G | 45.5 | 14.5 mm |
| 4 | H | 46.8 | 14.9 mm |
| 4.5 | I | 48 | 15.3 mm |
| 5 | J | 49.3 | 15.7 mm |
| 5.5 | K | 50.6 | 16.1 mm |
| 6 | L | 51.9 | 16.5 mm |
| 6.5 | M | 53.1 | 16.9 mm |
| 7 | N | 54.4 | 17.3 mm |
| 7.5 | O | 55.7 | 17.7 mm |
| 8 | P | 57 | 18.1 mm |
| 8.5 | Q | 58.2 | 18.5 mm |
| 9 | R | 59.5 | 18.9 mm |
| 9.5 | S | 60.8 | 19.4 mm |
| 10 | T | 62.1 | 19.8 mm |
| 10.5 | U | 63.3 | 20.2 mm |
| 11 | V | 64.6 | 20.6 mm |
| 11.5 | W | 65.9 | 21 mm |
| 12 | X | 67.2 | 21.4 mm |
| 12.5 | Y | 68.5 | 21.8 mm |
Not sure? Choose your best guess: the first resize within a year is free.