Europe Size 15 to US: L
Cross-market adult bracelet and cuff apparel conversion mapping 15 specifications into L.

Analyzing Size Equivalence Across Markets
Europe Size 15: Corresponds to a wrist circumference baseline of 14 (5.5 ), bracelet length of 15 (5.9 ), and fit classification Snug / Compact.
US: L: Corresponds to a wrist circumference baseline of 17.5 (6.9 ), bracelet length of 19.5 (7.7 ), and fit classification Standard / Regular.