1. UNIQUE DESIGN: The heel pad features a 4D design that automatically adjusts to help prevent heel slippage and blisters. The heel liners have small columned bumps that provide extra cushioning for the heels and reduce friction between the shoe and foot, offering a comfortable 360-degree massaging effect. 2. HIGH QUALITY HEEL LINERS: These heel cushion inserts are made from recyclable silicone with a self-adhesive backing. The heel insoles are non-toxic, flexible, soft, and comfortable. 3. EASY TO USE: These heel cushions have a self-adhesive back. After peeling off the protective cover, they can be easily attached to the inside back of the shoe. 4. MULTIPLE CHOICE: Our heel stickers are suitable for various shoe types, including leather shoes, high heels, ballet flats, and casual shoes. They work well with new shoes or shoes that are slightly oversized, and are designed for men and women of all ages. These heel stickers help address shoe fit issues, allowing you to comfortably wear your shoes while walking, running, dancing, or shopping. 5. SIZE GUIDE XS: 2mm thickness, fits shoes with normal size S: 3.8mm thickness, fits shoes 0.5 size larger than normal L: 5mm thickness, fits shoes 1 size larger than normal XL: 6mm thickness, fits shoes 1.5 sizes larger than normal