Your ring size (EU/CH) is the circumference of your finger in mm. Cosytas sizes are shown in bold.
| Size EU/CH | Circumference | Diameter | US (approx.) |
|---|---|---|---|
| 50 | 50 mm | 15.9 mm | 5 |
| 51 | 51 mm | 16.2 mm | 5.5 |
| 52 | 52 mm | 16.6 mm | 6 |
| 53 | 53 mm | 16.9 mm | 6.5 |
| 54 | 54 mm | 17.2 mm | 7 |
| 55 | 55 mm | 17.5 mm | 7.5 |
| 56 | 56 mm | 17.8 mm | 7.5 |
| 57 | 57 mm | 18.1 mm | 8 |
| 58 | 58 mm | 18.5 mm | 8.5 |
How to measure: Wrap a piece of string around your finger, mark where the ends meet and measure the length in mm. If you are between two sizes, choose the larger one.