Size 0: (3 15/16 To 4 1/8 Inches W x 4 1/8 To 4 5/16 Inches L). This product has a great performance, quality and price. The boot opens up completely to slip on and off most hoof shapes and sizes. The rear double Velcro attachment protects the entire hoof wall and keeps the boot firmly in place. Front shield protects the area that takes the most abuse. Proven tread design handles a wide range of conditions. Simple closure makes this the easiest hoof boot in the world. Recommended for medium-distance riding of up to 25 miles per week. Manufacturer: EasyCare INC.