I have a new pitbull, Hes an American pi bull, Do you want to know anything about pit bulls? 
Yes! tell me all about them! Ive always stayed away because of all the horror stories
Well Pit bull is such a common name for a type of dog but some people call them "killer" or other bad stuff, but really they are very docile animals. 
whats the most popular type?
The most formal and popular breeds are the the American Pit Bull Terrier, American Staffordshire Terrier, American Bully, and Staffordshire Bull Terrier.
how big do they get
Males normally are about 18-21 inches tall and only weigh around 35-60 pounds.