What size of what dogs? The pix in the film is not a huge dog, but substantial.
While a regular PBT breed should not be more than a medium-height dog, no doubt there are those “bred for size” (like my beloved German Shepherds, who should NOT be more than 90 lbs but many brag of their “120 lb beast” and indeed, they are oversized).
AND, pit-bull terrier is a TYPE; in fact, I’d say a better category is “bulldog”, because not all are terriers though the terrier generally made it more tenacious and terrifying, as if fighting nasty bulls wasn’t enough. Bulldogs and Boston Terriers and French Bulldogs and Bull Terriers all fall under that “type”, e.g., BUT the nastiness was bred out long ago. (I trust those dogs.)
The dog I referred to is the one pictured with the victim. The article said that dog and the other were about 120 lb. each. I have a 120 lb. Great Dane who looks quite large because, although quite thin, he stands about as tall as a whitetail deer. Then, horror of horrors, my other dog, who weighs 90 lb., is half American Staffordshire Terrier, a quarter Labrador, and eighth Golden, and and eighth Cocker Spaniel. When I adopted him from a human society over twelve years ago as a puppy, he was represented as being half Great Dane and half black Lab. He’s been a great dog all his life, except for thinking he owns half of what was my bed.
Neither of my dogs has ever been spoiled.