http://www.bioone.org/doi/abs/10.1670/07-030.1
I know this thread is a little on the old side but I was curious whether males or females were typically larger. The guy I bought my pair of bulls from told me that females get way bigger but I have read so much conflicting information about this on the internet that it's driving me crazy. Seems like every other care sheet/info I find says something different in regards to size in male vs female pituophis. The website i pasted above seems to actually be pretty scientific and concrete about male vs female bull snake size. Seems like males and females get roughly the same size. I think many breeders may in fact have larger females simply due to the fact that they feed females a lot more so they have more baby's. I don't know this for a fact, I'm just guessing.