Ring Sizing
Two methods. One chart. Each ring is a fixed band, so the measurement resolves to a single value.
01
How to Measure
Two approaches. The result is the same.
Method A
From an Existing Ring
1Select a ring already worn comfortably on the intended finger.
2Measure the inner diameter with a ruler in millimeters.
3Match the diameter to the chart below.
Method B
String or Tape
1Wrap a non-stretch string around the finger where the ring will sit.
2Pull snug, not tight. Mark the overlap.
3Measure the marked length in millimeters. This is the circumference.
4Match the circumference to the chart below.
02
Size Chart
All sizes in millimeters. Match the diameter or circumference to the corresponding US size.
| US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 3 | 14.1 | 44.2 |
| 3.5 | 14.5 | 45.5 |
| 4 | 14.9 | 46.8 |
| 4.5 | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.8 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.1 | 56.9 |
| 8.5 | 18.5 | 58.2 |
| 9 | 18.9 | 59.4 |
| 9.5 | 19.3 | 60.7 |
| 10 | 19.7 | 62.0 |
| 10.5 | 20.1 | 63.2 |
| 11 | 20.5 | 64.5 |
| 11.5 | 20.9 | 65.8 |
| 12 | 21.3 | 67.1 |
| 12.5 | 21.7 | 68.3 |
| 13 | 22.1 | 69.6 |
03
Notes
Measure two or three times. Take the average.
Measure at normal hand temperature. Not cold, not directly after exercise.
Knuckle wider than the base of the finger. Size to the knuckle, not the base.
Between two sizes, the larger one. Comfort over precision.
Fit is structural.
A correctly sized band disappears on the hand. The form holds. The metal does not announce itself. That is the standard.
All rings