The American Bull Staffy is a medium-sized, powerfully built dog typically standing 43 to 53 cm at the shoulder and weighing between 16 and 25 kg. The build is stocky and muscular with a broad chest, strong shoulders, and a deep, powerful neck. The head is large and broad, with a strong, shortened muzzle that may carry a degree of brachycephalic structure from both parent breeds. Ears are typically semi-erect or folded forward; the tail is medium length and carried low when relaxed.
The coat is short, smooth, and very easy to maintain. Colours include white, brindle, fawn, red, black, and a wide range of combinations from both parent lines, often with white markings. The overall impression is of a compact, athletic, and physically imposing medium dog with an expression that combines the Staffy’s characteristic warmth with the American Bulldog’s confident assurance.