US: 2T-4T to Europe Size 35-37
Cross-market children’s hats, beanies, caps, sun hats, and ear-flap hats apparel conversion mapping 2T-4T specifications into 35-37.

Analyzing Size Equivalence Across Markets
US: 2T-4T: Corresponds to a head circumference baseline of 50 (19.7 ) and age range 24–48 .
Europe Size 35-37: Corresponds to a head circumference baseline of 36 (14.2 ) and age range 0–1 .