Measure your finger and find your ring size
A ring size is based on its inner circumference: a 54 mm finger is a French size 54 and a US size 7. So all you need is an accurate measurement of your finger.
How to measure
- Measure at the end of the day, with hands at room temperature: fingers swell slightly during the day and in the heat.
- Wrap a thin strip of paper or a piece of string around the base of the finger, without squeezing.
- Mark the point where the strip overlaps, and check that it slides over the knuckle: the ring will have to pass it.
- Unroll it and measure the length with a ruler, in millimetres, then find your size in the chart below.
Common mistakes
- Measuring in the morning or in cold weather: the ring will be tight in summer.
- A string that stretches or paper that is too thick.
- Forgetting the knuckle: a ring that fits at the base of the finger may not pass the joint.
- Measuring another finger, or the other hand: sizes often differ by one or two units.
What this measurement is for
Rings, wedding bands and engagement rings. To buy a ring as a surprise, measure the inner circumference of a ring the person already wears on the same finger instead.
Ring size chart
| Circumference (mm) | Diameter (mm) | FR size | US size |
|---|---|---|---|
| 46.8 | 14.9 | 47 | 4 |
| 49.3 | 15.7 | 49 | 5 |
| 51.9 | 16.5 | 52 | 6 |
| 54.4 | 17.3 | 54 | 7 |
| 57.0 | 18.1 | 57 | 8 |
| 59.5 | 18.9 | 60 | 9 |
| 62.1 | 19.8 | 62 | 10 |
| 64.6 | 20.6 | 65 | 11 |
| 67.2 | 21.4 | 67 | 12 |
| 69.7 | 22.2 | 70 | 13 |
Between two sizes, choose the larger one, especially for a wide band.
Keep your measurements at hand
Save them in Mataï with your sizes brand by brand: dated, always up to date, and shareable with the people close to you for gifts in the right size.
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