To use, adjust The Best Friend™ Deluxe Grazing Muzzle to the horse using the same principles as the fit of a comfortable halter. Leave approximately one inch between the horse's mouth and the inside of the muzzle. The Deluxe muzzle has a roomy fit to allow for chewing. You should be able to fit two to three fingers sideways between your horse's face and the muzzle. This is our most popular design because it is so easy to use and costs less than purchasing a separate breakaway halter. Black.