These juDanzy tube socks come with our juDanzy anti-slip grip soles, designed to protect your little ones from slipping on smooth surfaces. 0-6 months = Shoe Size 0 - 1 6-12 months = Shoe Size 1 - 3 12-24 Months = Shoe Size 3-6 2-4 Years = Shoe Size 6-9 4-6 Years = Shoe Size 9-1