Ring Size Chart
| United Kingdom/Australia | United States | Japan/Italy | Spain | Germany | France | Internal Diameter / Circumference (mm) |
|---|---|---|---|---|---|---|
| F | 3 | 4 | 4.25 | 14 | 44 | 14.1 / 44.2 |
| G 1/2 | 3 1/2 | 5.5 | 5.5 | 14.5 | 45.5 | 14.5 / 45.5 |
| H 1/2 | 4 | 6.75 | 6.75 | 15 | 47 | 14.9 / 46.8 |
| I 1/2 | 4 1/2 | 8 | 8 | 15.25 | 48 | 15.3 / 48.0 |
| J 1/2 | 5 | 9.25 | 9.25 | 15.75 | 49.5 | 15.7 / 49.3 |
| L | 5 1/2 | 10.5 | 10.5 | 16 | 50.5 | 16.1 / 50.6 |
| M | 6 | 12 | 12 | 16.5 | 52 | 16.5 / 51.9 |
| N | 6 1/2 | 13 | 13 | 17 | 53 | 16.9 / 53.1 |
| O | 7 | 14.5 | 14.5 | 17.25 | 54.5 | 17.3 / 54.4 |
| P | 7 1/2 | 16 | 16 | 17.75 | 56 | 17.7 / 55.7 |
| Q | 8 | 17 | 17 | 18 | 57 | 18.1 / 57 |
| R | 8 1/2 | 18.5 | 18.5 | 18.5 | 58.5 | 18.5 / 58.3 |
| S | 9 | 19.75 | 19.75 | 19 | 59.5 | 18.9 / 59.5 |
| T | 9 1/2 | 21 | 21 | 19.5 | 61 | 19.4 / 60.8 |
| T 1/2 | 10 | 22.25 | 22.25 | 20 | 62.5 | 19.8 / 62.1 |
| U 1/2 | 10 1/2 | 23.5 | 23.5 | 20.25 | 63.5 | 20.2 / 63.4 |
| V 1/2 | 11 | 25 | 25 | 20.75 | 65 | 20.6 / 64.6 |
| W 3/4 | 11 1/2 | 26 | 26 | 21 | 66 | 21 / 65.9 |
| Y | 12 | 27.5 | 27.5 | 21.25 | 67.5 | 21.4 / 67.2 |
| Z | 12 1/2 | 28.75 | 28.75 | 21.75 | 69 | 21.8 / 68.5 |
| Z+1 | 13 | 30 | 30 | 22 | 70 | 22.2 / 69.7 |
How To Measure an Existing Ring
Choose a ring that already fits your finger well which is a similar width of the ring you would like to purchase.
- Measure the interior diameter of the ring in millimeters (mm).
- Use the measurement chart above to match the size of your ring to the closest UK size in mm.
Alan Bick Customer Service
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