Shorven Baby Kids Cotton Socks Knee High Long Socks Fabric:Cotton&Spandex S(6-18 Months) whole length:10.2"(26cm)/sole length:3.9"(10cm)/Fit for baby's feet length in 9-13cm/3.5-5.1"(Shoe size 1M-5M approx.) M(2-4 Years) whole length:11"(28cm)/sole length:4.7"(12cm)/Fit for baby's feet length in 11-15cm/4.3-5.9"(Shoe size 5M-8.5M approx.) Age is just for reference,please choose the right size according to the size info. The little 3D paws (made of silicone ) on sole can make the socks anti-slip.