General Appearance: The general appearance of the Boston Terrier should be that of a lively, highly intelligent, smooth coated, short headed, compactly built, short tailed, well balanced dog of medium station, of brindle colour and evenly marked with white. The head should indicate a high degree of intelligence, and should be in proportion to the size of the dog; the body rather short and well knit, the limbs strong and neatly turned; tail short and no feature be so prominent that the dog appears badly proportioned.

Skull: Square, flat on top, free from wrinkles, cheeks flat, brow abrupt, stop well defined.

Eyes: Wide apart, large and round, dark in colour, expression alert, but kind and intelligent. The eyes should be set square in the skull, and the outside corners should be on a line with the cheeks as viewed from the front.

Muzzle: Short, square, wide and deep and in proportion to skull; free from wrinkles, shorter in length than in width and depth, not exceeding in length approximately one third of length of skull; the muzzle from stop to end of nose on a line parallel to the top of the skull, nose black and wide, with well defined line between nostrils. The jaws broad and square, with short regular teeth. Bite even or sufficiently undershot to square muzzle.

Neck: Of fair length, slightly arched and carrying the head gracefully, setting neatly into shoulders.

Body: Deep with good width of chest, shoulders sloping, back short, ribs deep and well sprung, carried well back to loins, loins short and muscular, rump curving slightly to set on of tail, flank very slightly cut up. The body shold appear short but not chunky.

Elbows: Standing neither in nor out.

Forelegs: Set moderately wide apart and on a line with the point of the shoulders, straight in bone land well muscled, pasters short and strong.

Hind Legs: Set true, bent at stifles, short from hocks to feet, hocks turning neither in nor out, thighs strong and well muscled.

Feet: Round, small and compact toes well arched.

Gait: The gait of the Boston Terrier is that of a sure footed straight gaited dog, forelegs and hind legs moving straight ahead in line with perfect rhythm.

Ideal Colour: Brindle with white markings. The brindle to be evenly distributed and distinct. Black with white markings permissible but brindle with white markings preferred. Ideal Markings: White muzzle, even white blaze over head, collar, breast, part or whole of forelegs and hind legs below hocks.

CoatShort, smooth, bright and fine in texture.

Size: Height: 10 -16 inches - Weight: 11 -24 lbs.