Find out your ring size
The most accurate way to find your ring size is to measure a ring that already fits the correct finger comfortably.
Open this on your phone
The sizer measures against a real screen, so it needs a phone. Go to 9dunes.com/pages/ring-sizer on your mobile — or use the size chart below if you already know your measurement.
Your page is zoomed. Pinch back to 100% or the measurement will be wrong.
Measure a ring you own
- Take a ring that already fits the finger well.
- Lay it flat on the dark circle below.
- Slide until the circle is exactly filled by the inside of the ring (not outside!).
Your size
17
17.0 mm across
Size chart
| Size | Inner Ø | Around |
|---|---|---|
| 14 | 14.0 mm | 44.0 mm |
| 15 | 15.0 mm | 47.1 mm |
| 16 | 16.0 mm | 50.3 mm |
| 17 | 17.0 mm | 53.4 mm |
| 18 | 18.0 mm | 56.5 mm |
| 19 | 19.0 mm | 59.7 mm |
| 20 | 20.0 mm | 62.8 mm |
| 21 | 21.0 mm | 66.0 mm |
Sizing tips
- Between two sizes? Take the larger one.
- Wide bands feel tighter — go one size up.
- Measure warm. Cold fingers read small.
- No ring to hand? Wrap paper around your finger, mark the overlap, measure it, and find that length in the “Around” column.