Information
Size Guide
Finding the right ring size helps ensure a comfortable fit from the start. Use the guide below to measure a ring that already fits or check your finger size at home, then match the result to our size chart.
Measure a ring that already fits
Choose a ring that fits the intended finger well. Measure the inner diameter in millimeters, then match it to the US size in the chart below. EU / ISO sizes are shown as inner circumference in millimeters.
Measure your finger
Wrap a thin strip of paper or a flexible measuring tape around the base of your finger. Mark where the ends meet, then compare the measurement to the size chart below. For the most comfortable fit, measure more than once and avoid wrapping too tightly.
Tips for the best fit
- Measure at the end of the day, when your fingers are at their most natural size.
- If you are between sizes, choose the larger one.
- Wider bands may fit more snugly, so a slightly larger size may feel more comfortable.
- If your knuckle is wider than the base of your finger, choose a size that slides on comfortably without feeling loose.
Use the chart below to match your measurement to US, EU / ISO, and UK / AU ring sizes.
| Diameter (mm) | US | EU / ISO (mm) | UK / AU |
|---|---|---|---|
| 14.1 | 3 | 44 | F |
| 14.5 | 3.5 | 46 | G |
| 14.9 | 4 | 47 | H |
| 15.3 | 4.5 | 48 | I |
| 15.7 | 5 | 49 | J |
| 16.1 | 5.5 | 51 | K |
| 16.5 | 6 | 52 | L |
| 16.9 | 6.5 | 53 | M |
| 17.3 | 7 | 54 | N |
| 17.7 | 7.5 | 56 | O |
| 18.1 | 8 | 57 | P |
| 18.5 | 8.5 | 58 | Q |
| 19.0 | 9 | 60 | R |
| 19.4 | 9.5 | 61 | S |
| 19.8 | 10 | 62 | T |
| 20.2 | 10.5 | 64 | U |
| 20.6 | 11 | 65 | V |
| 21.0 | 11.5 | 66 | W |
| 21.4 | 12 | 67 | X |
| 21.8 | 12.5 | 68 | Y |
| 22.2 | 13 | 70 | Z |
Still unsure? Contact us and we’ll be happy to help you choose the most comfortable size.