This boot is ideal for continuous soaking when conditions such as abscesses thrush puncture wounds and other aggravated foot conditions exist. It also relieves pressure when signs of bruises, corns or cankers appear. The soft pliable upper closes tightly just below the fetlock and opens wide for easy on-off application. The durable triple-layered bottom is made of a tough polyvinyl compound. Sold Individually. To measure hoof: Trace around the outside of hoof and then measure toe to heel, then side to side. When ordering "Medicine Soaking Boot" order a boot that is 1" larger than orginal measurements. Size Wide Long (Small) 5 1/4" 5 5/8" (Med) 5 5/8" 6 1/8" (Large) 6 1/4" 7" (X-Lg) 7 1/4" 7 3/4"