Jefferies Socks Boys' Race Car Low Cut  (Pack of 3) 97% Polyester, 3% Spandex Imported Machine Wash This is a 3 pair pack of socks Sock size toddler - shoe size 3-7 - age 1-2 yrs Sock size xs - shoe size 6-11 - age 2-4 yrs Sock size s - shoe size 9-1 - age 3-7 yrs