Christian Louboutin "So Kate" 100 Black Calf Skin Leather Booty Size 37.5 EU/7.5 US Simple elegance with clean lines, the So Kate Booty has become a true icon. These dramatic ankle booties are crafted of smooth calfskin leather in black. Pointed toe, a 4-inch wrapped stiletto heel, a zippered instep, and signature red-lacquered soles. Dust bags and box included.