Easy to stretch both calf muscle and achilles tendonSold as a set of 2Each wedge measures 13"L x 13"W x 3.8"H at the tallestCan be stacked to create more angles100% 30-DAY MONEY-BACK GUARANTEE: Your satisfaction is our top priority! If you are not truly satisfied with your purchase, simply return it within 30 days for a full refund! Improve Your Balance and Form During Yoga, Pilates, or Exercise Routines with Cushioned StrongTek Yoga Wedges! When you?re looking for a smart way to stretch your calf muscles or protect your joints during exercises, want to expand your flexibility and forms, or need a low-impact way to increase muscle activation, StrongTek Yoga Wedges can help improve your squats, stretching, and other workout routines with soft, cushioned comfort. This foam wedge helps to make your muscles more responsive during exercising; helps you stretch properly and reduce the chance of injury. Not only helpful to stretching before/after work out, but also beneficial to the body recovery from plantar fasciitis, achilles tendon injuries, shin splints, calf strains and other foot and ankle injuries and pain. Each wedge measures 13" x 12", with the standing area about 15-20% larger than other wedges. It is perfect to use a single unit in your exercise, or combine both to create an extra-large size. GREAT KNEE PADS. Made of high-density foam -- the popular EVA environment-friendly material. These yoga wedges can be used as your largest knee pads.