The Breed Standard:
The French Bulldog has the appearance of an active, intelligent, muscular dog of heavy bone, smooth coat, compactly built, and of medium or small structure. Expression alert, curious, and interested. Any alteration other than removal of dewclaws is considered mutilation and is a disqualification. Proportion and Symmetry – All points are well distributed and bear good relation one to the other; no feature being in such prominence from either excess or lack of quality that the animal appears poorly proportioned.
Head large and square. Eyes dark in color, wide apart, set low down in the skull, as far from the ears as possible, round in form, of moderate size, neither sunken nor bulging. In lighter colored dogs, lighter colored eyes are acceptable. No haw and no white of the eye showing when looking forward. Ears Known as the bat ear, broad at the base, elongated, with round top, set high on the head but not too close together, and carried erect with the orifice to the front. The leather of the ear fine and soft. Other than bat ears is a disqualification. The top of the skull flat between the ears; the forehead is not flat but slightly rounded.
Neck, Topline, Body
The neck is thick and well arched with loose skin at the throat. The back is a roach back with a slight fall close behind the shoulders; strong and short, broad at the shoulders and narrowing at the loins. The body is short and well rounded. The chest is broad, deep, and full; well ribbed with the belly tucked up. The tail is either straight or screwed (but not curly), short, hung low, thick root and fine tip; carried low in repose.
Forelegs are short, stout, straight, muscular and set wide apart. Dewclaws may be removed. Feet are moderate in size, compact and firmly set. Toes compact, well split up, with high knuckles and short stubby nails.
Coat is moderately fine, brilliant, short and smooth. Skin is soft and loose, especially at the head and shoulders, forming wrinkles.
Hind legs are strong and muscular, longer than the forelegs, so as to elevate the loins above the shoulders. Hocks well let down. Feet are moderate in size, compact and firmly set. Toes compact, well split up, with high knuckles and short stubby nails; hind feet slightly longer than forefeet.