DURANT Ring Size & Conversion Guide
A tailored fit is essential, whether you're selecting a signature piece for yourself or a considered gift for someone else. Our international ring size conversion guide has been created to offer clarity across global standards, allowing you to confidently select the correct size from anywhere in the world.
If you’re unsure of your size, you can use our Measurement App on your mobile phone, or follow our simple self-measurement guide detailed below.
International Ring Size Chart
| Inner Diameter (mm) | Circumference (mm) | US & Canada | EU (ISO) | Australia & NZ | China & Japan |
|---|---|---|---|---|---|
| 14.01 | 44.0 | 3 | 44 | F | 4 |
| 14.33 | 45.0 | 3.5 | 45 | G | 5 |
| 14.65 | 46.0 | 3.75 | 46 | G½ | 6 |
| 14.97 | 47.0 | 4 | 47 | H½ | 7 |
| 15.29 | 48.0 | 4.5 | 48 | I½ | 8 |
| 15.61 | 49.0 | 5 | 49 | J½ | 9 |
| 15.92 | 50.0 | 5.5 | 50 | K½ | 10 |
| 16.24 | 51.0 | 5.75 | 51 | L½ | 11 |
| 16.56 | 52.0 | 6 | 52 | M | 12 |
| 16.88 | 53.0 | 6.5 | 53 | N | 13 |
| 17.20 | 54.0 | 7 | 54 | O | 14 |
| 17.52 | 55.0 | 7.25 | 55 | P | 15 |
| 17.83 | 56.0 | 7.5 | 56 | P½ | 16 |
| 18.15 | 57.0 | 8 | 57 | Q½ | 17 |
| 18.47 | 58.0 | 8.5 | 58 | R½ | 18 |
| 18.79 | 59.0 | 8.75 | 59 | S | 19 |
| 19.10 | 60.0 | 9 | 60 | S½ | 20 |
| 19.42 | 61.0 | 9.5 | 61 | T½ | 21 |
| 19.74 | 62.0 | 10 | 62 | U½ | 22 |
| 20.06 | 63.0 | 10.5 | 63 | V½ | 23 |
| 20.38 | 64.0 | 10.75 | 64 | W | 24 |
| 20.70 | 65.0 | 11 | 65 | W½ | 25 |
| 21.01 | 66.0 | 11.5 | 66 | X½ | 26 |
| 21.33 | 67.0 | 11.75 | 67 | Y½ | 27 |
| 21.65 | 68.0 | 12 | 68 | Z | 28 |
| 21.97 | 69.0 | 12.5 | 69 | Z+1 | 29 |
How to measure your size
• Wrap a thin strip of paper, ribbon, or string around the base of your finger
• Mark the point where the ends meet
• Lay it flat and measure the length with a ruler in millimeters
• Match the measurement to the circumference column above to find your size
• For the most accurate result, measure at the end of the day when your fingers are at their largest
If you have any questions or need assistance, please contact the 'DURANT by Johanna Johnson' team.