US: 10–12.5 to Europe Size 35–37
Cross-market women’s sock and hosiery conversion mapping 10–12.5 specifications into 35–37.

Analyzing Women’s Sock Size Equivalence Across Markets
US: 10–12.5: Corresponds to a foot length range of 25.5–27.5 (10–10.8 ), US shoe size bracket of 10–12.5, and fit classification Comfort Stretch / Ankle Grip.
Europe Size 35–37: Corresponds to a foot length range of 21.5–23 (8.5–9.1 ), US shoe size bracket of 5–6.5, and fit classification Comfort Stretch / Ankle Grip.