If you lose a sock, adults are on their own, but kids get a pair and a spare!  Approximate sizing is based on age and shoe size as follows:

• Baby Small; 3-12 months

• Baby Medium; 12-24 months

• Kids Small; 3-6 years

• Kids Medium; 7-10 years

Machine wash and dry.  Fabric content is 62% cotton, 22% polyester, 15% nylon and 1% lycra.