Europe Size 55.5 to US: 9

Cross-market men’s wedding band and signet ring size conversion mapping 55.5 specifications into 9.

From Standard & Size
EU
Converted Equivalent
US
7.5
Based on row equivalence: US 7.5 | EU 55.5
Standard cross-walk matching active anthropometric row parameters.
Europe Size 55.5 to US: 9 Men’s Rings Conversion

Analyzing Ring Size Equivalence Across Markets

Europe Size 55.5: Features an inner finger circumference of 55.7 mm\text{mm} (2.19 in\text{in}), and an inner diameter of 17.7 mm\text{mm} (0.697 in\text{in}).

US: 9: Features an inner finger circumference of 59.5 mm\text{mm} (2.34 in\text{in}), and an inner diameter of 18.9 mm\text{mm} (0.744 in\text{in}).

Other Conversions to US: 9