Ring sizing is the one measurement worth getting right the first time. Use either method below, then match your result to the chart.
How to Measure Your Ring Size
1. Measure a ring you already own
- Pick a ring that fits the finger you have in mind.
- Measure the inside diameter in millimetres, straight across the centre.
- Find that diameter in the chart to get your US size.
2. Measure with string or paper
- Wrap a strip of paper or a piece of string around the base of your finger.
- Mark where the ends meet.
- Measure the marked length in millimetres — that is your circumference.
Tip: measure at the end of the day, when your fingers are at their largest. Avoid measuring when your hands are cold.
US Ring Size Chart
| US Size | Inside Diameter (mm) | Inside Circumference (mm) | Circumference (in) |
|---|---|---|---|
| 6 | 16.5 | 51.9 | 2.04 |
| 7 | 17.3 | 54.4 | 2.14 |
| 8 | 18.1 | 57.0 | 2.24 |
| 9 | 18.9 | 59.5 | 2.34 |
| 10 | 19.8 | 62.1 | 2.44 |
| 11 | 20.6 | 64.6 | 2.54 |
| 12 | 21.4 | 67.2 | 2.65 |
| 13 | 22.2 | 69.7 | 2.74 |
| 14 | 23.0 | 72.3 | 2.85 |
| 15 | 23.8 | 74.8 | 2.94 |
Sizes are approximate. If you fall between two sizes we recommend sizing up, especially for wider bands.
Still Not Sure?
Between sizes?
Size up for comfort. A wider band sits tighter than a thin one at the same nominal size.
Buying as a gift?
Borrow a ring they already wear and measure the inside diameter. If in doubt, order and use our 30-day returns.
30-day returns
Not the right fit? Return or exchange within 30 days of delivery.