US: 8.5 to Europe Size 45.5
Cross-market women’s rings, stacking bands, and statement jewelry conversion mapping 8.5 specifications into 45.5.

Analyzing Ring Size Equivalence Across Markets
US: 8.5: Features an inner diameter of 18.5 (0.728 ), inner circumference of 58.3 (2.29 ), and standard numerical or letter ring scales optimized for women’s sizing curves.
Europe Size 45.5: Features an inner diameter of 14.5 (0.571 ), inner circumference of 45.5 (1.79 ).
Other Conversions to Europe Size 45.5
US: 3 → eu-45-53 to eu-45-5
View
US: 3.5 → eu-45-53.5 to eu-45-5
View
US: 4 → eu-45-54 to eu-45-5
View
US: 4.5 → eu-45-54.5 to eu-45-5
View
US: 5 → eu-45-55 to eu-45-5
View
US: 5.5 → eu-45-55.5 to eu-45-5
View
US: 6 → eu-45-56 to eu-45-5
View
US: 6.5 → eu-45-56.5 to eu-45-5
View
US: 7 → eu-45-57 to eu-45-5
View
US: 7.5 → eu-45-57.5 to eu-45-5
View
US: 8 → eu-45-58 to eu-45-5
View
US: 8.5 → eu-45-58.5 to eu-45-5
View