US: 2T-4T to Europe Size 18-20
Cross-market children’s socks, tights, hosiery, leg warmers, and dance tights sizing conversion mapping 2T-4T specifications into 18-20.

Analyzing Size Equivalence Across Markets
US: 2T-4T: Corresponds to a foot length of 15.5 (6.1 ), matching US shoe size 8-9, and age range 24–48 months.
Europe Size 18-20: Corresponds to a foot length of 11.5 (4.5 ), matching US shoe size 3-4, and age range 6–12 months.