Size
We use standard US ring sizes.
The reliable way is a ring that already fits that finger. The inner diameter, in millimeters, is the number that matters. A paper strip works if you mark the overlap snugly, not tight, and measure the length in millimeters. That length is the circumference.
Fingers are smaller in the morning and in air-conditioning. Measure at the end of the day. If the knuckle is larger than the base of the finger, size to the knuckle so the ring can pass over it.
A band over 4 mm wide feels tighter than a thin band of the same size. Order half a size up if the listing says the band is 5 mm or more, unless you already wear a wide band in that size.
A plain or solitaire ring in 18k gold or platinum can usually be resized once, within a year of delivery, if you tell us the new size. Up to two sizes either way is normal. Eternity bands, alternative metals, and some tension settings cannot be resized. The listing says when a design cannot.
Measure a ring that fits, or a strip of paper around the finger, at the end of the day. The number we use is the standard US size.
| US size | Inside diameter | Inside circumference | UK |
|---|---|---|---|
| 4 | 14.9 mm | 46.8 mm | H |
| 5 | 15.7 mm | 49.3 mm | J 1/2 |
| 6 | 16.5 mm | 51.8 mm | L 1/2 |
| 7 | 17.3 mm | 54.4 mm | N 1/2 |
| 8 | 18.1 mm | 57.0 mm | P 1/2 |
| 9 | 18.9 mm | 59.5 mm | R 1/2 |
| 10 | 19.8 mm | 62.1 mm | T 1/2 |
| 11 | 20.6 mm | 64.6 mm | V 1/2 |
| 12 | 21.4 mm | 67.2 mm | Y |
| 13 | 22.2 mm | 69.7 mm | Z+1 |
Knuckles larger than the base of the finger need the larger of the two measurements. Wide bands fit tighter than a thin band of the same size. If you are between sizes, write before you order.
