*First off, is there a good site that will tell me how to sex my 2 ball pythons? Perferably with pictures?

**I got my first ball python this past June. It was a baby, about only 1 foot long and about the width of a quarter or so. Very young. It being 6 months later, how much larger should it be by now?

***I have 2 healthy pythons in seperate tanks. One is considerably larger than the other. Can I put them both together? Is there any chance they will attack each other? Should I gradually introduce them or is that not necessary? Will it make any difference (with their behavior towards each other) if they are both the same sex? or opposite sexes?

Sorry if these questions have already been asked. I appreciate your help.