US Ring Sizing
| Inside Diameter (mm) | Circumference (mm) | Ring Size |
|---|---|---|
| 11.63 | 36.50 | 0 |
| 11.84 | 37.20 | 1/4 |
| 12.04 | 37.80 | 1/2 |
| 12.24 | 38.50 | 3/4 |
| 12.45 | 39.10 | 1 |
| 12.65 | 39.70 | 1 1/4 |
| 12.85 | 40.40 | 1 1/2 |
| 13.06 | 41.00 | 1 3/4 |
| 13.26 | 41.70 | 2 |
| 13.46 | 42.30 | 2 1/4 |
| 13.67 | 42.90 | 2 1/2 |
| 13.87 | 43.60 | 2 3/4 |
| 14.07 | 44.20 | 3 |
| 14.27 | 44.80 | 3 1/4 |
| 14.48 | 45.50 | 3 1/2 |
| 14.68 | 46.10 | 3 3/4 |
| 14.88 | 46.80 | 4 |
| 15.09 | 47.40 | 4 1/4 |
| 15.29 | 48.00 | 4 1/2 |
| 15.49 | 48.70 | 4 3/4 |
| 15.70 | 49.30 | 5 |
| 15.90 | 50.00 | 5 1/4 |
| 16.10 | 50.60 | 5 1/2 |
| 16.31 | 51.20 | 5 3/4 |
| 16.51 | 51.90 | 6 |
| 16.71 | 52.50 | 6 1/4 |
| 16.92 | 53.10 | 6 1/2 |
| 17.12 | 53.80 | 6 3/4 |
| 17.32 | 54.40 | 7 |
| 17.53 | 55.10 | 7 1/4 |
| 17.73 | 55.70 | 7 1/2 |
| 17.93 | 56.30 | 7 3/4 |
| 18.14 | 57.00 | 8 |
| 18.34 | 57.60 | 8 1/4 |
| 18.54 | 58.30 | 8 1/2 |
| 18.75 | 58.90 | 8 3/4 |
| 18.95 | 59.50 | 9 |
| 19.15 | 60.20 | 9 1/4 |
| 19.35 | 60.80 | 9 1/2 |
| 19.56 | 61.40 | 9 3/4 |
| 19.76 | 62.10 | 10 |
| 19.96 | 62.70 | 10 1/4 |
| 20.17 | 63.40 | 10 1/2 |
| 20.37 | 64.00 | 10 3/4 |
| 20.57 | 64.60 | 11 |
| 20.78 | 65.30 | 11 1/4 |
| 20.98 | 65.90 | 11 1/2 |
| 21.18 | 66.60 | 11 3/4 |
| 21.39 | 67.20 | 12 |
| 21.59 | 67.80 | 12 1/4 |
| 21.79 | 68.50 | 12 1/2 |
| 22.00 | 69.10 | 12 3/4 |
| 22.20 | 69.70 | 13 |
| 22.40 | 70.40 | 13 1/4 |
| 22.61 | 71.00 | 13 1/2 |
| 22.81 | 71.70 | 13 3/4 |
| 23.01 | 72.30 | 14 |
| 23.22 | 72.90 | 14 1/4 |
| 23.42 | 73.60 | 14 1/2 |
| 23.62 | 74.20 | 14 3/4 |
| 23.83 | 74.80 | 15 |
| 24.03 | 75.50 | 15 1/4 |
| 24.23 | 76.10 | 15 1/2 |
| 24.43 | 76.80 | 15 3/4 |
| 24.64 | 77.40 | 16 |
