15-35 lbs (7-16 kg). Average chewers. Fun to chew, chase & fetch. Durable natural rubber. Insert treats to extend play time. Dogs need to play. User guide inside. Recommended by vets worldwide. Entertains and satisfies average chewers. Stuff with treats, pastes or peanut butter. kongcompany.com. Power chewers may need to size up one or two sizes and/or use the Kong Extreme line. Carton made with wind energy. Made in USA.