US: 5–6.5 to Europe Size 44–45
Cross-market women’s sock and hosiery conversion mapping 5–6.5 specifications into 44–45.

Analyzing Women’s Sock Size Equivalence Across Markets
US: 5–6.5: 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.
Europe Size 44–45: Corresponds to a foot length range of 27.5–29 (10.8–11.4 ), US shoe size bracket of 13–14.5, and fit classification Relaxed Stretch / Extended Fit.