The Bulldog is a breed with characteristically wide head and shoulders along with a pronounced mandible there are generally thick folds of skin on a Bulldog's brow; round, black, wide-set eyes; a short muzzle with characteristic folds called "rope" above the nose; hanging skin under the neck; drooping lips and pointed teeth. The coat is short, flat and sleek, with colors of red, fawn, white, brindle (mixed colors, often in waves or irregular stripes).

In the US, a typical mature male weighs approximately 55-60 pounds. Mature females weigh in at approximately 45 pounds. The breed standards are 55 pounds for a male and 50 pounds for a female.

Temperament

Despite their famous "sourpuss" expression, Bulldogs are generally docile and tractable. However, they can move very quickly over short distances. Bulldogs do not need a lot of physical exercise, so they are well suited for living in apartments and other urban environments. They are friendly and gregarious, but occasionally willful. The phrase "stubborn as a Bulldog" may derive from observing an agitated Bulldog. They rank 78th out of 80 in holding the lowest degree of working/obedience intelligence.

According to the (AKC) a Bulldog's "disposition should be equable and kind, resolute and courageous (not vicious or aggressive), and demeanor should be pacific and dignified. These attributes should be countenanced by the expression and behavior."

Breeders have worked to reduce/remove aggression from these dogs, and as such, the Bulldog is known to be of good temperament. Some, particularly males, may not get along with other dogs or strangers but most have a friendly, patient nature. Generally, Bulldogs are known for getting along well with children, other dogs, and pets. They can be so attached to home and family that they will not venture out of the yard without a human companion and are more likely to sleep on someone's lap than chase a ball around the yard.