If you have a ring that fits
Lay it on a ruler and measure straight across the inside, edge to edge,
in millimetres. Match that to the table below. This is the more accurate of the two.
If you don't
Wrap a strip of paper or a piece of string around the base of the finger, snug but not
tight. Mark where it overlaps, lay it flat against a ruler, and read the length in
millimetres. That is the circumference.
| US size | Inside diameter | Circumference |
| 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 | 18.9 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 at the end of the day. Fingers are at their largest then.
- Cold hands measure small. Warm up first.
- A wide band fits tighter than a thin one. Go up a quarter or half size.
- The ring has to clear your knuckle. If the knuckle is much larger, size to the knuckle.
- Between two sizes? Take the larger.
Still unsure? Any jeweler will size your finger in a couple of minutes,
and we are glad to talk it through before you order.
Ask us.