This is a leather tape set for handmade crafts. It's thick and durable natural leather (cowhide). These are scraps. Widths: 3, 5, 10, 15 mm and other narrow widths Length: 10-61 cm Thickness: Approximately 1.8-2.3 mm Cut from a single piece of leather. A light treatment agent has been applied to reduce fraying. Please refrain from purchasing if you are concerned about deterioration over time. It's thick and durable. Using leather will result in a higher-quality finish.