Usage Tips:Foam clasps. Foam heels made of comfortable 4D foam and breathable polyester fabric. Lightweight, soft heels help reduce the size of shoes, eliminate slack in the shoe, and after cutting, you can perfectly fit them to the shoe. They prevent heel abrasions. They have one side covered with glue, so they do not slide in the shoe when walking, just tear off the protective film and place in the back of the shoe. The clasps come in two types of graves 0,5 cm and 1 cm. Size Chart: Length: 11,5 cm Width: 8 cm Thickness: 0,5 cm Length: 11,5 cm Width: 8 cm Thickness: 1 cm Technical parameter Product code: A067_03 - Fasteners Every shoe and every foot is inna. Depending on your needs, you can choose the perfect thickness not only to compensate for the difference in size, but at the same time to create a pillow that further increases wearing comfort. Advantages: They prevent the heel from slipping out of the shoe. Filling the free space in the shoe. Protect your feet from abrasion. Heel protection against abrasion. Pasted into a shoe. cut. Flexible, soft. Product code: A067_03 - Fasteners How to use: To properly place heels in shoes you need to: Try the heel on the shoe and then cut it accordingly. Remove the protective film from the back of the insole and place the heel in the back of the shoe. After sticking it to the shoe, press it down so that it fits well in any place. Wait a few minutes for the glue to start working.