The following is a standard adopted when the Boston Terrier was known as the Round Headed Bull and Terrier dog.
*SKULL- Large, broad and flat
*STOP- Well defined
*EARS- Preferably cut, if left on should be small and thin, situated as near the corners of the skull as possible; rose ears preferably *EYES- Wide apart, large, round, dark and soft and not "google" eyed.
*MUZZLE-Short, wide and deep, without wrinkles, nose should be black and wide.
*MOUTH- Preferably even, teeth should covered when the mouth is closed.
*NECK- Thick, clean and strong.
*BODY- Deep at chest and well ribbed up, making a short backed, colby built dog; loins and buttocks strong.
*LEGS- Straight and well muscled.
*TAIL- Short and fine, straight or screw, carried low.
*COLOR- Any color, except black, mouse or liver; brindle or whole white are the colors preferred.
*COAT- Short, fine, bright and hard.
*SYMMETRY- Of a high order.
*DISQUALIFICATIONS- Hair lip, docked tail and any artifical means used to to deceive the judge.
*WEIGHT- It was voted to divide the different weights into three classes, as follows: 15 pounds and under, 25 pounds and under and 36 pounds and under.
SCALE OF POINTS
*SKULL 15 
*MUZZLE 15
*NOSE 5
*EYES 5
*EARS 5
*NECK 5
*BODY 10
*LEGS AND FEET 10
*TAIL 10
*COLOR AND COAT 10
*SYMMETRY 10
_____________________________
TOTAL 100
NON-SPORTING GROUP
GENERAL APPEARANCE
The Boston Terrier is a lively, highly intelligent, smooth coated, short-headed, compactly built, short-tailed, well balanced dog, brindle, seal or black in color and evenly marked with white.The head is in proportion to the size of the dog and the expression indicates a high degree of intelligence. The body is rather short and well knit, the limbs strong and neatly turned, the tail short and no feature is so prominent that the dog appears badly proportioned. The dog conveys an impression of determination, strength and activity, with style of a high order; carriage easy and graceful. A proportionate combination of "Color and White Markings" is particularly distinctive of a representative specimen. "Balance, Expression, Color and White Markings" should be given particular consideration in determining the relative value of GENERAL APPEARANCE to other points.
SIZE, PROPORTION, SUBSTANCE
Weight is divided by classes as follows:
*Under 15 pounds.
*15 pounds and under 20 pounds.
*20 pounds and not to exceed 25 pounds.
The length of leg must balance with the length of body to give the Boston Terrier it's striking appearance. The Boston Terrier is a sturdy dog and must not appear to be either spindly or coarse. The bone and muscle must be in proportion as well as an enhancement to the dog's weight and structure.
*FAULT* Blocky or chunky in appearance.
INFLUENCE OF SEX
In a comparison of each sex, the only evident difference is a slight refinement in the bitch's conformation.
HEAD
The skull is square, flat on top, free from wrinkles, cheeks flat, brow abrupt and the stop well defined. The ideal Boston Terrier expression is alert and kind indicating a high degree of intelligence. This is a most important characteristic of the breed. The eyes are wide apart, large and round and dark in color. The eyes are set square in the skull and the outside corners are on a line with the cheeks as viewed from the front.
*DISQUALIFY* Eyes blue in color or any trace of blue.
The ears are small, carried erect, either natural or cropped to conform to the shape of the head and situated as near to the corners of the skull as possible. The muzzle is short, square, wide and deep and in proportion to the skull. It is free from wrinkles, shorter in length than in width or depth; not exceeding in length approximately one-third of the length of the skull. The nose is black and wide, with a well defined line between the nostrils.
*DISQUALIFY* Dudley nose.
The jaw is broad and square with short regular teeth. The bite is even or sufficiently undershot to square the muzzle. The chops are of good depth, but not pendulous, completely covering the teeth when the mouth is closed.
*SERIOUS FAULT* Wry mouth.
*HEAD FAULTS* Eyes showing too much white or haw. Pinched or wide nostrils. Size of ears out of proportion to the size of the head.
*SERIOUS HEAD FAULTS* Any showing of the tongue or teeth when the mouth is closed.
NECK, TOP LINE AND BODY
The length of neck must display an image of balance to the total dog. It is slightly arched, carrying the head gracefully and setting neatly into the shoulders. The back is just short enough to square the body. The top line is level and the rump curves slightly to the set-on of the tail. The chest is deep with good width, ribs well sprung and carried well back to the loins. The body should appear short. The tail is set on low, short, fine and tapering, straight or screw and must not be carried above the horizontal. (NOTE: The preferred tail set does not exceed in length more than one-quarter the distance from set-on to hock.)
*DISQUALIFY* Docked tail.
*BODY FAULTS* Gaily carried tail.
*SERIOUS BODY FAULTS* Roach back, sway back, slab sided.
FOREQUARTERS- The shoulders are sloping and are well laid back, which allows for the Boston Terrier's stylish movement. The elbows stand neither in nor out. The forelegs are moderately wide apart and are on a line with the upper tip of the shoulder blades. The forelegs are straight in bone with short, strong pasterns. The dewclaws may be removed. The feet are small, round, and compact, turned in nor out, with well arched toes and short nails.
*FAULTS* Legs lacking in structure; splay feet.
HINDQUARTERS- The thighs are strong and well muscled, bent at the stifles and set true. The hocks are short to the feet, turning in nor out, with a well defined hock joint. The feet are small and compact with short nails.
*FAULT* Straight in stifle.
GAIT- The gait of the Boston Terrier is that of a sure footed, straight gaited dog, forelegs and hind legs moving ahead with perfect rhythm, each step indicating grace and power.
*GAIT FAULTS* There will be no rolling, paddling, or weaving when gaited. Hockney gait.
*SERIOUS GAIT FAULTS* Any crossing movement either front or rear.
COAT- The coat is short, bright and fine in texture.
COLOR AND MARKINGS- Brindle, seal or black with white markings. Brindle is preferred ONLY if all other qualities are equal (NOTE: SEAL DEFINED: Seal appears black except it has a reddish cast when viewed in the sun or bright light.)
*DISQUALIFY* Solid black, solid brindle, or solid seal without the required white markings. Gray or liver colors.
REQUIRED WHITE MARKINGS- White muzzle band, white blaze between the eyes, white fore chest.
DESIRED WHITE MARKINGS- White muzzle band, even white blaze between the eyes and over the head, white collar, white fore chest, white on part or whole of the forelegs and hind legs below the hocks. (NOTE: A representative specimen should not be penalized for not possessing "desired white markings.") A dog with a preponderance of white on the head or body must possess sufficient merit otherwise to counteract it's deficiencies.
TEMPERAMENT- The Boston Terrier is a friendly and lively dog. The breed has an excellent disposition and a high degree of intelligence, which makes the Boston Terrier an incomparable companion.
SUMMARY- The clean-cut short backed body of the Boston Terrier coupled with the unique characteristics of his square head and jaw, and his striking markings have resulted in a most dapper and charming American origional: The Boston Terrier.

GENERAL IMPRESSION- The Colored Boston Terrier is a breed of it's own. It should look and act neither like a Bulldog or a Terrier. It's character is resilient, affectionate, loyal and playful. It's purpose is solely to offer the very best in companionship.
The Colored Boston Terrier is lively, alert and inquisitive, giving an impression of intelligence and responsiveness. The body and structure is upstanding, collected, compact, with a clean, handsome outline and carriage.
HEAD- The head should be square being proportionate to the overall size of the body. Skull not domed. Muzzle considerably shorter than skull.
MUZZLE- Broad, square and short. Stop, pronounced and deep. Roman (nose pointing downwards) a serious fault. Parallel planes of muzzle and skull.
JAWS- The jaw should be as broad as the muzzle and provide a square appearance. Lips should be clean and not too pendulous or hanging. Must entirely cover front teeth when mouth is closed.
BITE- A slight under bite is preferred to create an evenly squared muzzle, to add to the square appearance of the head. Exceedingly undershot bite, wry jaw, teeth showing, are serious faults.
NOSE- All colors are acceptable. The nose should be a solid color. Nostrils are not to be pinched or overly wide. A solid unpigmented nose, butterfly nose or spotted nose that lacks pigment is a major fault.
EARS-The ears should be set high whether cropped or natural. Medium to small, well formed and strong, ear leather not thick and heavy. Falling, bent over (tulip), or broken ears that are unable to stand when the dog is alert, are a major fault.
EYES- The eyes should be round and expressive, set fairly wide apart and facing towards the front, not on the side of the head. Any color is acceptable except blue. Odd colored eyes (one dark, one light) are a significant fault. Eyes showing too much white or haw are a minor fault. Eyes should not be bulging or protruding.
NECK- Neck should have the appearance of being sleek, without excess loose skin or throatiness, slightly arched, blending smoothly into the shoulders and topline without overly prominent dips or bumps. A short, overly thick, bully neck is a fault. From shoulders to hip, top line level without each or sway back, croup from hip to tail slightly angled downward.
CHEST- The chest should be deep, extended well back and down to elbow, of adequate width, but never so wide as to look bully. Muscles smooth, not loaded and bunchy.
COLOR- Any colors or patterns are acceptable with the exception of merle.
COAT- The coat is to be short, smooth and glossy.
SIZE- 10-25 pounds, over 25 pounds is a fault fault, losing character and appearance of the breed.
FOREQUARTERS- Shoulders should be strong and laid back sufficiently to allow good front reach when gaiting. Weak, long pasterns are faulted. The forelegs straight and parallel viewed from front. Elbows turned neither in nor out, but in line with straight front legs from shoulder to ground. Feet pointing straight forward. Width of chest giving neither impression of narrow spindliness or bulliness. Chest area filled in between front legs down to elbows.
HINDQUARTERS- The hindquarters should be smoothly muscled without bunchiness. Stifles moderately well bent with short hocks. Hock joint should be well defined with hocks straight up and down at right angles to ground from any angle.
Straight rear from hip to foot viewed from the side (under angulated) resulting in stilted, poor movement, is faulted. Any turning of the hock outward or inward is a fault.
FEET- Feet should be round with pasterns being short, strong and tight. Dew claws may be left natural or removed.
GAIT- The Colored Boston Terrier's trot is collected and together, smooth, efficient, with balanced reach and drive, covering ground well and without wasted motion. The CBT can single track at a faster trot or may double track at slower speeds.
