AKC Standard

General Appearance: The Miniature Bull Terrier must be strongly built, symmetrical and active, with a keen, determined and intelligent expression. He should be full of fire, having a courageous, even temperament and be amenable to discipline.
Size, Proportion, Substance: Height 10 to 14 inches. Dogs outside these limits should be faulted. Weight in proportion to height. In proportion, the Miniature Bull Terrier should give the appearance of being square.

Head: The head should be long, strong and deep, right to the end of the muzzle, but not coarse. The full face should be oval in outline and be filled completely up, giving the impression of fullness with a surface devoid of hollows or indentations, i.e., egg shaped. The profile should curve gently downwards from the top of the skull to the tip of the nose. The forehead should be flat across from ear to ear. The distance from the tip of the nose to the eyes should be perceptibly greater than that from the eyes to the top of the skull. The underjaw should be deep and well defined.

To achieve a keen, determined and intelligent expression, the eyes should be well sunken and as dark as possible with a piercing glint. They should be small, triangular and obliquely placed, set near together and high up on the dog’s head. The ears should be small, thin and placed close together, capable of being held stiffly erect when they point upwards. The nose should be black, with well developed nostrils bent downwards at the tip. The lips should be clean and tight.

The teeth should meet in either a level or scissor bite. In the scissor bite, the top teeth should fit in front of and closely against the lower teeth. The teeth should be sound, strong and perfectly regular.
Neck, Topline, Body: The neck should be very muscular, long, and arched; tapering from the shoulders to the head, it should be free from loose skin. The back should be short and strong with a slight arch over the loin. Behind the shoulders there should be no slackness or dip at the withers. The body should be well rounded with marked spring of rib. The back ribs deep.

The chest should be broad when viewed from in front. There should be great depth from withers to brisket, so that the latter is nearer to the ground than the belly. The underline, from the brisket to the belly, should form a graceful upward curve. The tail should be short, set on low, fine, and should be carried horizontally. It should be thick where it joins the body, and should taper to a fine point.

Forequarters: The shoulders should be strong and muscular, but without heaviness. The shoulder blades should be wide and flat and there should be a very pronounced backward slope from the bottom edge of the blade to the top edge. The legs should be big boned but not to the point of coarseness. The forelegs should be of moderate length, perfectly straight, and the dog must stand firmly up on them. The elbows must turn neither in nor out, and the pasterns should be strong and upright.