Knee high sock with polka dots and stripes, supportive arch brace * SmartWool inside for moisture, temperature, and odor control. Flat knit toe seam. Knee high height, non-cushion sole. * 80% merino wool, 19% nylon, 1% elastane, washing machine and dryer friendly! * Kid"s Size XS=shoe size 6-8.5, S-shoe size 9-11.5, M=shoe size 12-2.5, L=shoe size 3-10