Smartwool Kilim Patchwork Sock - Women's wool Women's sock sizes Small (shoe size 4-6.5) Medium (shoe size 7-9.5) Large (shoe size 10-12.5) NOTE Women's size Small fits Youth shoe size 2-4.5) Crew height, cushioned. Supportive arch brace, virtually seamless toe. 75% merino wool, 22% nylon, 3% elastane. Washer and dryer friendly! WOW Technology, with strategic mesh zones for maximum ventilation.