Great All Around Support Boots (Sold in pairs) all around protection and support for your horse doesn't cost a fortune. Soft form fitting neoprene on the inside, sticky touch tape on the outside. This boot provides support through the bottom strap that goes around the fetlock and also offers protection to the sigmoid area. Very similar to Professional Choice. Colors: Black or White Size: Small for small horses or large boned ponies, Medium for most horses'' front Large for average horses'' hind or Warm bloods'' front. X-large for those really big guys Most horses or ponies wear one size larger on the hind legs than on the front legs.