The Boston Terrier
is a breed
originating in the United States of America
. This "American Gentleman" was accepted in 1893 by the American Kennel Club as a non-sporting breed.
Color and markings are important when distinguishing this breed to the AKC standard. They should be either black, brindle or seal with white markings.
Bostons are small and compact with a short tail and erect ears. The AKC says they are highly intelligent and very easily trained.
They are friendly and can be stubborn at times. The average life span of a Boston is around 11 to 13 years, though some can live well into their teens.
Boston Terriers are typically small, compactly built, well proportioned dogs
with erect ears, short tails
, and a short muzzle
that should be free of wrinkles
They usually have a square sort of face. The smooth coats of the Boston Terriers are mainly brindle, seal or black with even white markings.
3 Month Old Male Boston Terrier
According to international breed standard, the dog should weigh no less than 10 pounds and no more than 25 pounds. Boston Terriers usually stand 15-17 inches at the withers.
Coat and color
The Boston Terrier is characteristically marked with white in proportion to either black, brindle, seal, or a combination of the three. Seal is a color specifically used to describe Boston Terriers and is defined as a black color with red highlights when viewed in the sun or bright light. Black, Brindle, and Seal (all on white) are the only colors recognized by the AKC. There are also liver, brown, cream or red and white Boston Terriers, however these markings are more rare than the others listed above, and are able to be AKC registered but not to be shown in dog shows as it is not the normal for Boston Terriers. If all other qualities are identical, brindle is the preferred color according to most breed standards.
Ideally, white should cover its chest, muzzle, band around the neck, half way up the forelegs, up to the hocks on the rear legs, and a white blaze between but not touching the eyes. For conformation showing, symmetrical markings are preferred. Due to the Boston Terrier's markings resembling formal wear, in addition to its refined and pleasant personality, the breed is commonly referred to as the "American Gentleman." 
The Boston Terrier is a gentle breed that typically has a strong, happy-go-lucky and friendly personality. Bostons are generally eager to please their owner and can easily be trained given a patient owner.
While originally bred for hunting rats in garment factories, they were later down bred for companionship. The modern Boston Terrier can be gentle, alert, expressive, creative, and well-mannered. It must be noted however, that they are not considered terriers by the American Kennel Club, but are part of the non-sporting group. So the terrier part of their name is something of a misnomer.
Both females and males are generally quiet and bark only when necessary. Their usually sensible attitude towards barking makes them excellent choices for apartment dwellers. Having been bred as a companion dog, they enjoy being around people, and if properly socialized, get along well with children, the elderly, other canines, and non-canine pets