International conversions Nov 15, 2026 3 min read
Ring Size Conversion: US to EU
EU ring sizing uses inner circumference in mm directly. US 7 = EU 54 (54mm inner circumference). Italian sizing matches EU. French sizing has its own scale.
The Chart
| US | EU (mm) | France | Italy |
|---|---|---|---|
| 4 | 47 | 47 | 8 |
| 5 | 49 | 49 | 10 |
| 6 | 51 | 51 | 12 |
| 7 | 54 | 54 | 15 |
| 8 | 57 | 57 | 17 |
| 9 | 59 | 59 | 20 |
| 10 | 61 | 61 | 22 |
| 11 | 64 | 64 | 24 |
| 12 | 66 | 66 | 27 |
| 13 | 69 | 69 | 29 |
FAQs
What's the EU number?
Inner circumference in mm. EU 54 = 54mm circumference = 17.2mm diameter. Most precise system because it's a direct measurement, no chart-lookup error.
Why French = EU?
France adopted the EU system. French and German rings labeled with the same circumference number. Italy stuck with its own historical numbering (1-30 ish) — different scale.
Need this on your store?
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