All HOOFix boots are fabric boots and flexible. They may vary slightly in size. Boots and pads do not need to be an exact fit to your horse's hoof, but should be as close as possible to size. Better to be a little large than too small.
Approximate size of boots: (in inches – width X length, measured straight across the boot)
Pony: 4 X 5
Small: 5 X 6
Regular: 5-1/2 X 6-1/4
Large: 6 X 6-3/4
Approximate size of slipper socks: (in inches – width X length)