Deluxe, heavy-duty halters are in sturdy nylon web, double and triple stiched with tough, nylon thread. Solid brass eyelets and hardware prevent wear and reduces stress and breakage. U.S.A. Sizes: Yearling (300 to 500 lbs), Small horse (500 to 800 lbs), Average horse (800 to 1100 lbs), Large horse (1100 to 1600 lbs).