Small = Youth Shoe Sizes 9-12 (4-8 Years) Medium = Youth Show Sizes 12-3 (6-10 Years) Large = Youth Shoe Sizes 4-6 (8-12 Years) Compression fit with arch support Comfortable soft feel on skin Multiple cushioning zones for more protection where it’s needed most A Real Treat for your Feet! Makes old shoes feel almost like new again. True Step Low-Cut Ankle Socks, High Performance Athletic Socks for Kids 2-Pair Pack = 2 Pairs of Low-Cut Ankle Socks Made with COOLMAX for comfort, stretch and durability. Compression fit with arch support. Wicks moisture away to keep feet feeling cooler and dryer. Multiple cushioning zones for more protection where it’s needed most. Lightweight mesh top of foot for improved ventilation. Anatomically correct Left and Right sock shape for perfect fit. Soft, Breathable, Lightweight, Quick Dry fabric blend with COOLMAX 50% Nylon, 10% Cotton, 34% Polyester, 6% Spandex Washing Instructions: Machine wash warm, Tumble dry medium, Do not Bleach, Do not iron, Do not dry clean.