International ring size chart
Convert US, UK, EU, Japan and China sizes at a glance.
Size converter
Enter a size in any system to convert it.
| US | UK | EU | Japan | China | India | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|---|---|---|
| US 3 | UK F | EU 44 | JP 4 | CN 4 | IN 14 | 14.1 | 44.2 |
| US 3.5 | UK G | EU 45 | JP 5 | CN 5 | IN 15 | 14.5 | 45.6 |
| US 4 | UK H | EU 46.5 | JP 7 | CN 6.5 | IN 15 | 14.9 | 46.8 |
| US 4.5 | UK I | EU 48 | JP 8 | CN 8 | IN 15 | 15.3 | 48.0 |
| US 5 | UK J | EU 49 | JP 9 | CN 9 | IN 16 | 15.7 | 49.3 |
| US 5.5 | UK K | EU 50.5 | JP 11 | CN 10.5 | IN 16 | 16.1 | 50.6 |
| US 6 | UK L | EU 51.5 | JP 12 | CN 11.5 | IN 17 | 16.5 | 51.9 |
| US 6.5 | UK M | EU 53 | JP 13 | CN 13 | IN 17 | 16.9 | 53.2 |
| US 7 | UK N | EU 54 | JP 14 | CN 14 | IN 17 | 17.3 | 54.4 |
| US 7.5 | UK O | EU 55.5 | JP 16 | CN 15.5 | IN 18 | 17.7 | 55.7 |
| US 8 | UK P | EU 57 | JP 17 | CN 17 | IN 18 | 18.2 | 57.2 |
| US 8.5 | UK Q | EU 58 | JP 18 | CN 18 | IN 19 | 18.5 | 58.2 |
| US 9 | UK R | EU 59 | JP 19 | CN 19 | IN 19 | 18.9 | 59.3 |
| US 9.5 | UK S | EU 61 | JP 21 | CN 21 | IN 19 | 19.4 | 61.0 |
| US 10 | UK T | EU 62 | JP 22 | CN 22 | IN 20 | 19.8 | 62.2 |
| US 10.5 | UK U | EU 63.5 | JP 24 | CN 23.5 | IN 20 | 20.2 | 63.5 |
| US 11 | UK V | EU 65 | JP 25 | CN 25 | IN 21 | 20.7 | 65.0 |
| US 11.5 | UK W | EU 66 | JP 26 | CN 26 | IN 21 | 21.1 | 66.2 |
| US 12 | UK X | EU 67.5 | JP 28 | CN 27.5 | IN 22 | 21.5 | 67.5 |
| US 12.5 | UK Y | EU 68.5 | JP 29 | CN 28.5 | IN 22 | 21.9 | 68.8 |
| US 13 | UK Z | EU 70 | JP 30 | CN 30 | IN 22 | 22.3 | 70.1 |
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