How to Find Your Ring Size at Home
A simple string-or-paper method to measure your ring size at home, with a millimetre-to-US size chart.
Buying a ring online is easy once you know your size. You do not need a jeweller's tool — a piece of string or a thin strip of paper is enough.
The string method
- Cut a thin strip of paper or a piece of non-stretchy string about 10 cm long.
- Wrap it around the base of the finger you want to wear the ring on.
- Mark the point where the ends meet with a pen.
- Lay it flat against a ruler and note the length in millimetres. This is your finger's circumference.
- Match the number to the chart below.
Size chart
| Circumference (mm) | Diameter (mm) | US size |
|---|---|---|
| 49.3 | 15.7 | 5 |
| 51.9 | 16.5 | 6 |
| 54.4 | 17.3 | 7 |
| 57.0 | 18.2 | 8 |
| 59.5 | 18.9 | 9 |
| 62.1 | 19.8 | 10 |
Between sizes? Choose the larger one for wider bands, and the smaller one for thin bands.
Tips for an accurate measurement
- Measure later in the day. Fingers are slightly larger in the evening and in warm weather, and smaller when cold.
- Allow for your knuckle. The ring has to pass over it, so if your knuckle is much larger than the base of your finger, size between the two.
- Wide bands fit tighter than thin ones, so size up slightly for a broad band.
- Measure more than once on different days if you can.
- Already own a ring that fits? Measure its inside diameter and compare it with the chart.
Not sure? Send us your measurement when you check out and our team will confirm the size with you before anything is finalised.
Ready to choose? Explore our rings for her or the men's collection.