The Bullmastiff is a powerful, sturdy, and muscular dog, which has remarkable endurance and strength. This dog has an athletic build, and strong, sturdy legs. The weight of the Bullmastiff is around 100-135 pounds, and the height is around 24-27 inches. The Bullmastiff's coat is short, sleek, and close fitting, and coloring varies from red fawn, fawn, brindle, and red. The breed is a medium shedder.