Europe Size 19 to US: M
Cross-market adult bracelet and cuff apparel conversion mapping 19 specifications into M.

Analyzing Size Equivalence Across Markets
Europe Size 19: Corresponds to a wrist circumference baseline of 17.5 (6.9 ), bracelet length of 19.5 (7.7 ), and fit classification Standard / Regular.
US: M: Corresponds to a wrist circumference baseline of 16.5 (6.5 ), bracelet length of 18 (7.1 ), and fit classification Standard / Regular.