Europe Size 63.5 to US: 9.5

Cross-market men’s wedding band and signet ring size conversion mapping 63.5 specifications into 9.5.

From Standard & Size
EU
Converted Equivalent
US
10.5
Based on row equivalence: US 10.5 | EU 63.5
Standard cross-walk matching active anthropometric row parameters.
Europe Size 63.5 to US: 9.5 Men’s Rings Conversion

Analyzing Ring Size Equivalence Across Markets

Europe Size 63.5: Features an inner finger circumference of 63.4 mm\text{mm} (2.5 in\text{in}), and an inner diameter of 20.2 mm\text{mm} (0.795 in\text{in}).

US: 9.5: Features an inner finger circumference of 60.8 mm\text{mm} (2.39 in\text{in}), and an inner diameter of 19.4 mm\text{mm} (0.764 in\text{in}).

Other Conversions to US: 9.5