The mastiff dog type is usually a large and powerful animal. They typically have a short coat, a large head and feet, and a broad but short muzzle. The ancestors of the mastiffs may have existed as long as 3,000 years ago.

Some of the better know breeds today that are classified as a mastiff-type dog include Bulldogs, Boxers, Great Dane, Rottweiler, and the dogs with mastiff as part of their name such as the Bullmastiff.