Now you can have your baby wearing the same comfortable UGG boots you enjoy! The Erin UGG boots is all you need in a bootie for an infant and it is made from the best quality sheepskin available. They are fully lined with extra-soft fleece and will fit nice and tight around your baby’s feet. The fleece will prevent your baby from have damp or wet feet and help keep them from catching a cold during the winter. measurements may vary by size.