The british bulldog is a breed with characteristically wide head and shoulders along with a pronounced mandibular prognathism. There are generally thick folds of skin on a british bulldog’s brow; round, black, wide-set eyes; a short muzzle with characteristic folds called a knot above the nose; hanging skin under the neck; drooping lips and pointed teeth, and occasionally an underbite. The coat is short, flat, and sleek, with colours of red, fawn, white, brindle, and piebald.
In the United Kingdom, the british bulldog puppies breed standards are 50 lb (23 kg) for a male and 40 lb (18 kg) for a female. In the United States, a typical mature male weighs 45–55 lb (20–25 kg), while mature females weigh about 45 lb (20 kg). The American Kennel Club recommends the average weight of a bulldog to be 40–50 lb (18–23 kg).
The british bulldog is one of the few breeds whose tail is naturally short and either straight or screwed and thus is not cut or docked as with some other breeds. A straight tail is a more desirable tail according to the breed standard set forth by the BCA if it is facing downward, not upwards.