Size Guide
- Use a ring that fits the desired finger.
- Measure the internal diameter of the ring (in mm). Ensure your ruler starts at the 0mm mark.
| Internal Diameter (mm) | US/CAN | UK/AUS | German |
|---|---|---|---|
| 14.1 mm | 3 | F | 14 |
| 14.9 mm | 4 | H 1/2 | 15 |
| 15.7 mm | 5 | J 1/2 | 15 3/4 |
| 16.5 mm | 6 | L 1/2 | 16 1/2 |
| 17.3 mm | 7 | O | 17 1/4 |
| 18.1 mm | 8 | Q | 18 |
| 19 mm | 9 | S | 19 |
| 19.8 mm | 10 | U | 19 3/4 |
| 20.6 mm | 11 | W | 20 1/2 |
| 21.4 mm | 12 | Y | 21 1/2 |