NIU ATELIER
Ring Size Guide
Not sure of your ring size? The most reliable way is to measure a ring that already fits the intended finger, or measure the finger itself with a strip of paper or string.
Two ways to measure
Measure an existing ring
Use a ruler (or the mm markings on a measuring tape) to measure the inner diameter of a ring that already fits — straight across the inside edge, in millimetres. Enter it below.
Measure your finger
Wrap a thin strip of paper or string snugly around the base of the finger, mark where it overlaps, then measure that length in millimetres — that’s the circumference. Enter it below.
Find Your Size
Full Size Chart
| US Size | UK Size | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| 3 | F | 14.1 | 44.2 |
| 3.5 | G | 14.5 | 45.5 |
| 4 | H | 14.9 | 46.8 |
| 4.5 | I | 15.3 | 48 |
| 5 | J | 15.7 | 49.3 |
| 5.5 | K | 16.1 | 50.6 |
| 6 | L | 16.5 | 51.9 |
| 6.5 | M | 16.9 | 53.1 |
| 7 | N | 17.3 | 54.4 |
| 7.5 | O | 17.7 | 55.7 |
| 8 | P | 18.1 | 57 |
| 8.5 | Q | 18.5 | 58.3 |
| 9 | R | 18.9 | 59.5 |
| 9.5 | S | 19.4 | 60.8 |
| 10 | T | 19.8 | 62.1 |
Still unsure? Reach out and our atelier concierge will help you find the right fit — see the exchange policy if a resize is ever needed after your order arrives.