Babies Socks Size Guide Newborn 3 - 3.5 inch 7.5 - 9 cm 0 - 6 mo 3.5 - 4 inch 9 -10 cm 0 - 1 yo 4 - 4.5 inch 10 -11.5 cm 1 - 2 yo 4 - 4.5 inch 11.5 - 12.5 cm Babies Socks Length Guide Foot Cover No Show Anklet CrewMedium Knee - High Thickness Guide Casual Socks Thin all over Thick Socks Thick full anklet