US Sizing: Small: Women&';s 5-7.5 Medium: Women&';s 8-10.5, Men&';s 6-8.5 Large: Women&';s 11-13.5, Men&';s 9-13 Extra Large: Men&';s 14-16 Light, breathable, and comfortably snug. This slightly thinner mini crew sock offers soft support, airy ventilation, and a barely-there feel that still delivers all-day performance. We love it for: daily miles Fabric: 72% polyester, 23% nylon, 5% elastane 6" mini crew height for versatile coverage Light cushioning for a thinner, lower-volume fit Breathable mesh zones above and below the arch Arch compression for support and structure Seamless toe and heel construction to reduce friction Moisture-wicking yarns help prevent blisters Anatomical left/right foot design for a more natural, stay-put fit