One of its most defining features is its head, which is very large and somewhat square-like, accentuated by muscular cheeks, a stern jaw, dark round eyes, a prominent black or dark nose, and a commanding box-like muzzle.

Despite their muscular, virulent build, American Bulldogs have a sweet and gentle appearance to their faces and a childlike alertness in their eyes. They are a protective guard dog breed with impressive intelligence and intuitiveness.

Adult male American Bulldogs should weigh seventy to one-hundred and twenty pounds, and females should be between sixty and one-hundred pounds. American Bulldogs are very agile and can jump as high as six feet, thanks to their incredibly strong hind legs. Males are generally between twenty-two and twenty-eight inches in height, and females are slightly shorter.