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Ring Size Guide
Find your perfect fit using our easy guide. All ring sizes shown on our product pages use US sizing. Use the conversion chart below for international size matching.
Measure an Existing Ring
- Choose a ring that fits comfortably.
- Measure the inside diameter (mm).
- Match your measurement to the chart.
Measure Your Finger
- Wrap paper or string around your finger.
- Mark the overlap and measure length (mm).
- Match to the circumference column.
Measure at end of day Avoid cold fingers Wider rings = size up
Important: Our product pages display US ring sizes. Please use this conversion chart to select your correct fit.
International Ring Size Conversion Chart
Measurements in millimetres (mm)
| US | UK | EU | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|
| 3 | F | 44 | 14.1 | 44.2 |
| 3.5 | G | 45 | 14.5 | 45.5 |
| 4 | H | 47 | 14.9 | 46.8 |
| 4.5 | I | 48 | 15.3 | 48.0 |
| 5 | J | 49 | 15.7 | 49.3 |
| 5.5 | K | 51 | 16.1 | 50.6 |
| 6 | L | 52 | 16.5 | 51.9 |
| 6.5 | M | 53 | 16.9 | 53.1 |
| 7 | N | 54 | 17.3 | 54.4 |
| 7.5 | O | 56 | 17.7 | 55.7 |
| 8 | P | 57 | 18.1 | 57.0 |
| 8.5 | Q | 58 | 18.6 | 58.3 |
| 9 | R | 60 | 18.9 | 59.5 |
| 9.5 | S | 61 | 19.4 | 60.8 |
| 10 | T | 62 | 19.8 | 62.1 |
| 10.5 | U | 63 | 20.2 | 63.4 |
| 11 | V | 65 | 20.6 | 64.6 |
| 11.5 | W | 66 | 21.0 | 65.9 |
| 12 | X | 67 | 21.4 | 67.2 |
| 12.5 | Y | 69 | 21.8 | 68.5 |
| 13 | Z | 70 | 22.2 | 69.7 |
Sizing Tip If your measurement falls between two sizes, choose the larger size for comfort. Wider band designs may feel tighter, so sizing up can ensure the perfect fit.