Heel size is about 12cm for infants 6-8 monthsMade of soft and breathable cotton material, comfortable fleece boots, light weight, stretchable, suitable for baby girls and boys before toddler or natural foot movement.Cute baby Christmas shoes, Santa Claus non-slip boots, Christmas penguin slippers, green and red Christmas tree slippers socks shoes, make your baby more cute and adorable.Anti-slip design, looks like soft non-slip floor socks, baby won't slip easily when wearing them, keep your child's feet warm all winter long, many moms and dads will really like itPerfect for Christmas, birthday, party, christening, building snowmen outdoors, playing indoors, photography/photography, family day or everyday casual wear in fall, winter and spring.