For kids shoe sizes 5C-8C(1-3 Years Old), 8C-13C (4-7 Years Old),shoe sizes 1-5 (8-11 Years old) and shoe sizes 6-10(12-16 Years Old),these socks hold up well after repeated washings. Super grips at sole of socks provide superb grip on slick surface such as wood floors,tile floors. Prevent falling or losing balance while walking or running. Enhance Your Performance,bring you more energy,make you jump higher,walk longer,climb higher,enhance your performance by the non-slip grip bottoms design. Soft, breathable and thick enough to protect feet from impact, this slipper socks with nylon blend specially provide superior comfort and support around arch and ankle. Machine wash. JHM Kids Slipper Socks Benefits and Features: -50% Cotton,35% Nylon, 10% Spandex,5% Polyster fiber,providing 360 degree stretch and flexibility,Superior Material, lasts longer! -Super grips at sole of socks provide superb grip on slick surface such as wood floors,tile floors. Prevent falling or losing balance while walking or running. -Greater comfort through ankle support and wider cuff for top band. -Perfect companion socks for sports,such as soccer,football,basketball,baseball, gym,kickboxing,yoga,riding etc. -Use of high quality knitted fabric is not torn or deformed to even wash by washing machine. -JHM kids slipper socks-A great gift idea to those that you care! Size Chart: US Sizing Guide - Shoe Sizes 5C-8C for Ages 1- 3 Shoe Sizes 8C-13C for Ages 4-7 -Shoe Sizes 1-5 for Ages 8-11 -Shoe Sizes 6-10 for Ages 12-16