These BootBands are made with a size 5 metal zipper and they have a dark metal zipper and are made with leather.
The metal zipper on your boot may be silver or gold and they resemble train tracks. When you touch them, you can feel that they are metal and not plastic. To determine what size you need, zip your boot all of the way up, then look on the back of the slider, which is on the inside of the boot. Look for a little number.
All BootBand sets include 2 Bands and 4 sliders.