Europe Size 62-64 to US: M
Cross-market adult earmuffs and headbands apparel conversion mapping 62-64 specifications into M.

Analyzing Size Equivalence Across Markets
Europe Size 62-64: Corresponds to a head circumference baseline of 63.5 (25 ) with a Relaxed / Expanded fit type.
US: M: Corresponds to a head circumference baseline of 57 (22.4 ) with a Standard / Regular fit type.