My husband and I love our matching stones.
| US size | Inside diameter | Circumference |
|---|---|---|
| 5 | 15.7 mm | 49.4 mm |
| 6 | 16.5 mm | 51.9 mm |
| 7 | 17.3 mm | 54.4 mm |
| 8 | 18.1 mm | 57.0 mm |
| 9 | 18.9 mm | 59.5 mm |
| 10 | 19.8 mm | 62.1 mm |
| 11 | 20.6 mm | 64.7 mm |
The easiest way is to measure a ring that already fits the right finger. Lay it flat, measure straight across the inside, and match that to the diameter column.
Or wrap a strip of paper around the finger, mark where it meets, and measure the length against the circumference column.
Not sure of the size? Sizes 6 and 7 are the most commonly worn. Rings cannot be exchanged for a different size, so it is worth checking first.
Small enough to give without ceremony. Fasten it on someone, or leave it where they will find it.