[Size Matters] Ditch the adjustable heel lift, only two sizes matter; 5mm & 9mm. Anything less than 5mm is not effective and taller shoe inserts, more than 9mm, will force you out of your shoes. [Fits Most Shoes] Dress shoes, running shoes, or even sandals, our heel inserts for men and women can fit inside of almost any shoe in your closet, providing relief for any occasion. [Firm & Durable] Our heel lift is constructed from a dense, high-quality rubber compound making them great heel lifts for Achilles tendonitis. These will not wear out like those made from leather. [Heel Pain Relief] Uneven leg length can wreak havoc on your body potentially causing knee, hip, and back pain. When one lift is used, these are great shoe lifts for uneven legs. [Instantly Increase Your Height] We can’t change your genetics but we can help make you taller with our heel wedge inserts. Our 9mm lifts are our recommended height increase insoles for men & women.