Find your ring size
A ring that fits slides over the knuckle with a little resistance and does not spin. If you are buying a surprise, borrow a ring they wear on the same finger.
Measure a ring that fits
Measure the inside diameter of the ring, edge to edge, in millimeters. Find the nearest size below.
| US size | Inside diameter | Inside circumference |
|---|---|---|
| 3 | 14.1 mm | 44.2 mm |
| 4 | 14.9 mm | 46.8 mm |
| 5 | 15.7 mm | 49.3 mm |
| 6 | 16.5 mm | 51.9 mm |
| 7 | 17.3 mm | 54.4 mm |
| 8 | 18.1 mm | 57.0 mm |
| 9 | 19.0 mm | 59.5 mm |
| 10 | 19.8 mm | 62.1 mm |
| 11 | 20.6 mm | 64.6 mm |
| 12 | 21.4 mm | 67.2 mm |
| 13 | 22.2 mm | 69.7 mm |
Measure the finger
- 1Wrap a strip of paper around the base of the finger, at the end of the day when it is largest.
- 2Mark where it overlaps, lay it flat and measure to the mark in millimeters.
- 3Match it to the circumference column. Between two sizes, choose the larger.
- 4Wide bands (6 mm and up) fit tighter: go up a quarter to a half size.