The Bull Terrier or English Bull Terrier is a breed of dog in the terrier family.

The Bull Terrier's most recognizable feature is its head, described as 'egg shaped' when viewed from the front, almost flat at the top, with a Roman muzzle sloping evenly down to the end of the nose with no stop. The unique triangle-shaped eyes are small, dark, and deep-set. The body is full and round, while the shoulders are robust and muscular and the tail is carried horizontally. It walks with a jaunty gait, and is popularly known as the 'gladiator of the canine race'.^[1]

There is no designated height or weight for the breed but the average is, Height: 51-61 cm (20-24 inches), Weight: 20-38 kg (44-85 pounds) The Bull Terrier and the Miniature Bull Terrier are the only recognized breeds that have triangle-shaped eyes.