The largest bull terrier?
There are several breeds of Dog referred to as Bull Terriers, and the largest is the American Pit Bull Terrier (or American Staffordshire Terrier) standing at between 17 and 19 inches at the shoulder. Another is the English Bull Terrier, which should stand at between 21 and 24 inches at the shoulder, but there is no defined height for this breed in the Kennel Club breed standard. The Staffordshire Bull Terrier usually stands at between 14 and 16 inches at the shoulder, but should not be much larger as it may be classified as a Pit Bull Terrier. Another breed is the Miniature (English) Bull Terrier, which should not be taller than 14 inches at the shoulder or it may be disqualified from professional showing. So, overall the largest of the Bull Terrier breeds is the American Staffordshire/Pit Bull Terrier.