I received this as a baby shower gift from someone in Australia. It's made of a very soft and fluffy material, and it feels great. I missed the chance to use them and my child outgrew them, so I hope someone who will cherish them can use them. The size is approximate. Officially, it's labeled as a size for babies aged 6-12 months. They were a little too small for my one-year-old, who is 13 cm, and couldn't wear them. I think they would be perfect for babies who haven't started walking yet, to keep their feet warm, and they can be used for a long time. Upper: sheepskin → Outer: Sheepskin Lining: sheepskin → Lining: Sheepskin Sole: Sheepskin → Sole: Sheepskin #koalabi #UGG #AustralianBrand