to be honist i dont know much about the breed of my dog his father i was told was an american staffordshire bull terrier and him mum was a staffordshire bull terrier i didnt know there was a diffrance mybe someone can tell me more about the kind of dog i have .
There is the American Staffordshire Terrier, and there is the Staffordshire Bull Terrier. Very big difference there.
I'm not trying to pick on you, and I do apologize for that. But you should really know something about your dog before you "stud him out." No dog should be bred unless you know it's registered, health tested, temperament tested, titled, and I'm sure many other steps along the way.
And to avoid confusion to any subsequent readers, I am referring to his other post about what age he should stud out his dog.
It's hard for someone to tell you how big your dog will be when it's fully grown. Genetics paly a huge role. He will continue to "fill out" until about two years of age. I would guess he probably won't get too much bigger than he is now.