Ring Size Converter
Convert ring sizes between US, UK, and EU systems, or calculate your ring size from finger circumference in mm.
Ring Size Result
Ring sizes differ across countries. You can convert between systems or measure your finger circumference.
How to measure your finger:
- Wrap a strip of paper or string around your finger
- Mark where it overlaps
- Measure the length in millimeters — that is your circumference
Ring size reference chart:
| Circumference (mm) | US | UK | EU |
|---|---|---|---|
| 44.2 | 3 | F | 44 |
| 46.8 | 4 | H | 47 |
| 49.3 | 5 | J | 49 |
| 51.9 | 6 | L | 52 |
| 54.4 | 7 | N | 54 |
| 57.0 | 8 | P | 57 |
| 59.5 | 9 | R | 60 |
| 62.1 | 10 | T | 62 |
| 64.6 | 11 | V | 65 |
| 67.2 | 12 | X | 67 |
Ring sizes are approximate. Visit a jeweler for exact sizing.