UGG baby boots. - Brand: UGG - Color: Brown - Style: Boots Thank you for viewing. The shoe size is M, which according to the UGG size guide, is 12.5cm. There is no non-slip material on the soles. I used these a few times as cold weather protection when putting my baby in the stroller from autumn to winter, although the shoes were a bit big for the non-walking stage at 4-6 months old. I am very sorry, but I am unable to respond during the day, so please refrain from price negotiations.