Nakd Fashion Black Rounded Toe Croc Heel Knee High Boots Sz 40 New. These boots are high-heeled and feature a rounded toe, straight, knee high shafts with a rounded edge, a stiletto heel and glossy faux crocodile material. Measurements in size : Heel height: 9,5 cm / 3.7 in. Shaft height: 42,5 cm / 16.7 in. Shaft circumference around the calf: 33 cm / 13 in. These boots come in black. Composition: Upper: 58% Recycled polyurethane, 42% Polyurethane. Lining: 100% Recycled polyester. Insole: 52% Recycled polyurethane, 48% Polyurethane. Heel: 100% Acrylonitrile butadiene styrene. Base: 100% TPU. Outsole: 60% Recycled rubber, 40% Rubber.