The breeds most often referred to as "pit bulls" are:
* American Staffordshire Terrier: Known for their muscular build and sturdy appearance, they are considered a medium-sized breed.
* American Pit Bull Terrier: Known for their athletic build and powerful physique, they are also considered a medium-sized breed.
* Staffordshire Bull Terrier: A smaller breed compared to the others, they are still a strong and energetic dog.
So, to answer your question, there isn't a "biggest pit bull breed". It depends on which breed you're specifically referring to.