US: 3-6M to Europe Size 1
Cross-market children’s gloves, mittens, and hand warmers apparel conversion mapping 3-6M specifications into 1.

Analyzing Gloves, Mittens & Hand Warmers Size Equivalence Across Markets
US: 3-6M: Corresponds to a hand width baseline of 6 (2.4 ), hand length of 10 (3.9 ), and age range 3–6 .
Europe Size 1: Corresponds to a hand width baseline of 5.5 (2.2 ), hand length of 8.5 (3.3 ), and age range 0–3 .