US: 6-8.5 to Europe Size 24-26
Cross-market children’s socks, tights, hosiery, leg warmers, and dance tights sizing conversion mapping 6-8.5 specifications into 24-26.

Analyzing Size Equivalence Across Markets
US: 6-8.5: Corresponds to a foot length of 20 (7.9 ), matching US shoe size 13-3, and age range 84–120 months.
Europe Size 24-26: Corresponds to a foot length of 15.5 (6.1 ), matching US shoe size 8-9, and age range 24–48 months.