New Balance Men's Core Cotton Quarter 6 Pack Socks 70% Cotton, 24% Polyester, 5% Nylon, 1% Lycra Spandex Imported Sizing Chart: Small = W 4-5.5; Medium = M 7.5 -9/W 6=10; Large = M 9-12.5/W 10-12; X-Large = M 12-16/W 13-15 NB DRY moisture management technology quickly moves sweat to keep feet cool and dry. Reinforced ring spun cotton delivers softness and strength. Cushioned foot bed designed to minimize shock absorption. Stability Fit built in for enhanced arch support