Size 12 - Koolaburra by UGG® Women's Koola Ultra Mini #1167970 Black The Size 12 Koolaburra by UGG® Women's Koola Ultra Mini Boots in black are ankle boots with a round toe and a pull-on closure. Made with sheepskin lining, suede upper material, and a cushioned heel, these boots offer comfort and style for casual occasions and travel. With a mid-height heel and lightweight design, these classic UGG boots are perfect for the winter and fall seasons. Made in Australia, these boots are a versatile addition to any woman's shoe collection.