EU to US ring size
Convert a EU ring size to US in one step. Enter your EU size and read the US equivalent, or use the full chart below.
EU to US ring size chart
| EU size | US size | Diameter (mm) |
|---|---|---|
| 44 | 3 | 14.1 |
| 45 | 3.5 | 14.5 |
| 47 | 4 | 14.9 |
| 48 | 4.5 | 15.3 |
| 49 | 5 | 15.7 |
| 50 | 5.5 | 16.1 |
| 52 | 6 | 16.5 |
| 53 | 6.5 | 16.9 |
| 54 | 7 | 17.3 |
| 56 | 7.5 | 17.7 |
| 57 | 8 | 18.1 |
| 58 | 8.5 | 18.5 |
| 59 | 9 | 19 |
| 61 | 9.5 | 19.4 |
| 62 | 10 | 19.8 |
| 63 | 10.5 | 20.2 |
| 64 | 11 | 20.6 |
| 66 | 11.5 | 21 |
| 67 | 12 | 21.4 |
| 68 | 12.5 | 21.8 |
| 69 | 13 | 22.2 |
EU and US ring sizes describe the same physical bands with different labels. Because every size maps to a real inside diameter in millimetres, the conversion between EU and US is exact, not an approximation. If you know the diameter of a ring that already fits, you can confirm both the EU and the US size from the millimetre column.
The most looked-up conversions on this page: a EU 52 is a US 6, a EU 54 is a US 7, and a EU 59 is a US 9. Women's rings most often fall around EU 52 to 54, while men's rings cluster near EU 59 and above.
If your size sits between two rows, size up. It is easier to pad or resize a ring that is a touch loose than to stretch one that will not clear your knuckle. For a hands-on check, print the true-scale ring sizer and match a ring you own.
Common questions
What is a EU 54 ring size in US?
A EU 54 ring is a US 7. Both labels describe the same band with an inside diameter of 17.3 mm.
How do I convert a EU ring size to US?
Find your EU size in the chart and read across to the US column, or use the converter above. Both point to the same physical band diameter, so the conversion is exact.
Is a EU ring size the same as US?
No, the labels differ, but the bands are the same physical sizes. The chart lines up each EU size with its US equivalent and the diameter in millimetres.
What if my size falls between two values?
Choose the larger size. A slightly loose ring can be resized or padded, but a ring that is too small will not pass the knuckle.
Last reviewed and updated on July 25, 2026. Conversion tables are checked against published international sizing standards.