By Finger's Circumference
Measure your finger's circumference following the three steps shown below. No ruler? A smartphone ruler app would do the work!
Use the table below to determine your ring size:| Circumference (mm) | USA / Canada |
| 44.2 | 3 |
| 46.8 | 4 |
| 49.3 | 5 |
| 51.9 | 6 |
| 54.4 | 7 |
| 57.0 | 8 |
| 59.5 | 9 |
| 62.1 | 10 |