The English Bulldog has a shoulder height of 31-36 cm (12-14 in) and weighs 22-25 kg (48-55 lbs). It is known for its short, wide muzzle, undershot jaw, and wide, droopy face giving the appearance of a frown. English Bulldogs have short legs and tails, rounded chests, and compact, muscular bodies.

The French Bulldog has a shoulder height of up to 30 cm (12 in) and weighs 9-13 kg (19-28 lbs). It has a wide head, round ears, and distinctive pointed ‘bat ears’ with an attentive expression. French Bulldogs have short legs and tails, rounded chests, and compact, muscular bodies. Their unique shape gives them a low center of gravity and an odd stride. The French Bulldog has the appearance of an active, intelligent, muscular dog of heavy bone, smooth coat, compact build, and medium or small structure. Expression is alert, curious, and interested.