EU to US ring size converter
A European (ISO 8653) ring size is the inner circumference in millimetres, so it converts cleanly to the US numeric scale. An EU 52 is roughly a US 6 and an EU 54 is roughly a US 7. Enter the EU number below for the exact US size.
US / Canada
7
ring size
UK / Australia
N
letter
EU / ISO
54
circumference
Japan
14
JIS size
Circumference
54.0 mm
2.13 in
Diameter
17.2 mm
0.677 in
Quick answer
A EU 54 is 7 in US (about 54.4 mm inner circumference). Use the converter for your exact size, or the chart below for the full range.
Between two sizes? Size up for a comfortable fit, see how to measure accurately.
EU → US at a glance
- 47 = 4
- 49 = 5
- 52 = 6
- 54 = 7
- 57 = 8
- 59 = 9
- 62 = 10
- 65 = 11
EU to US ring size chart
| EUEU / ISO | USUS / Canada | mmCircumference | mmDiameter |
|---|---|---|---|
| 47 | 4 | 46.7 | 14.9 |
| 48 | 4½ | 48.0 | 15.3 |
| 49 | 5 | 49.3 | 15.7 |
| 51 | 5½ | 50.5 | 16.1 |
| 52 | 6 | 51.8 | 16.5 |
| 53 | 6½ | 53.1 | 16.9 |
| 54 | 7 | 54.4 | 17.3 |
| 56 | 7½ | 55.6 | 17.7 |
| 57 | 8 | 56.9 | 18.1 |
| 58 | 8½ | 58.2 | 18.5 |
| 59 | 9 | 59.5 | 18.9 |
| 61 | 9½ | 60.7 | 19.3 |
| 62 | 10 | 62.0 | 19.7 |
| 63 | 10½ | 63.3 | 20.1 |
| 65 | 11 | 64.6 | 20.5 |
| 66 | 11½ | 65.8 | 21.0 |
| 67 | 12 | 67.1 | 21.4 |
Common questions
How do I convert a EU ring size to US?
Enter your EU size in the converter above and read the US result, or find your row in the chart below. Every value is calculated from the ring’s inner circumference, so it works in both directions.
What is a EU 54 in US?
A EU 54 is 7 in US. That ring has an inner circumference of about 54.4 mm.
Related conversions
Or see the full ring size chart.