Material: The shoe charms are made of waterproof PVC, they are safe and non-toxic.
 
Size: Each shoe charm's button diameter is 0.47", they fit any shoes with holes.
 
Easy to use: To install the shoe charm, please hold it and insert it from 45 degree angle. To take it off, reach into holes of shoes, use your fingers to push the bottom of the shoe charm slightly until it comes out.