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. According to international breed standard, the dog should weigh no less than 10 pounds and no more than 25 pounds. Few Boston Terriers weigh between 30 and 40 pounds, and most are considered healthy and not overweight due to their larger-than-average frame. Boston Terriers usually stand 15-17 inches at the withers(wikipedia)
Boston Terrier with brindle coat
3 month old Boston Terrier
Boston Terrier Popular Breed Dog