Adjustable Heel Lifts allow you to add up to 3/8" of lift instantly or peel away one or two layers to create a 1/4" or 1/8" lift in just seconds. Resilient rubber layers maintain their corrective lift while still helping absorb shock at heel strike. Attractive leather top cover adds durability. These heel lifts are also a great progressive treatment for Pelvic obliquity, Plantar Fasciitis and Achilles tendonitis. Use bilaterally to help relieve stress on the heel cord and plantar fasciia. Use with a post-op shoe to eliminate pelvic obliquity. This product is not made with natural rubber latex.?Heel Lift Sizing: (Small) fits most women, approximately 2"W x 4-1/4"L ; (Medium) fits larger women and smaller men, approximately 2-1/2" W x 4-1/2"L ; (Large) fits most men, approximately 3"W x 5"L.