Ring Sizing Guide
Option 1
Measure an Existing Ring
Select a ring that fits you well, measure the inside diameter, and match it to the table below.
Option 2
Use a String or Paper Strip
Wrap a string or paper strip around your finger, mark where it overlaps, then measure the length with a ruler to find the circumference.
| U.S. Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 3.00 | 14.1 | 44.2 |
| 3.25 | 14.3 | 45.0 |
| 3.5 | 14.5 | 45.5 |
| 3.75 | 14.7 | 46.3 |
| 4.00 | 15.1 | 47.6 |
| 4.25 | 15.1 | 47.6 |
| 4.5 | 15.3 | 48.0 |
| 4.75 | 15.5 | 48.7 |
| 5.00 | 15.7 | 49.3 |
| 5.25 | 15.9 | 50.0 |
| 5.50 | 16.1 | 50.6 |
| 5.75 | 16.3 | 51.2 |
| 6.00 | 16.5 | 51.8 |
| 6.25 | 16.7 | 52.5 |
| 6.50 | 16.9 | 53.1 |
| 6.75 | 17.1 | 53.8 |
| 7.00 | 17.3 | 54.4 |
| 7.25 | 17.5 | 55.1 |
| 7.50 | 17.7 | 55.7 |
| 7.75 | 17.9 | 56.3 |
| 8.00 | 18.1 | 57.0 |
| 8.25 | 18.3 | 57.6 |
| 8.50 | 18.5 | 58.3 |
| 8.75 | 18.7 | 58.9 |
| 9.00 | 18.9 | 59.5 |
| 9.25 | 19.1 | 60.2 |
| 9.50 | 19.3 | 60.8 |
| 9.75 | 19.5 | 61.4 |
| 10.0 | 19.7 | 62.1 |
