real life there's dozens of different sizes of bombs, rockets, and missiles.

ion torpedoes we know can be as small as an RPG, but is that the size of all ion torpedoes? how about the proton torpedo? the bombs themselves are they all one size or is there different sizes?
how many bombs can the various types of bombers carry?

i am curious because particularly in the prequel and original trilogies it seemed that all the bombers were scifi equivalents of dive/torpedo bombers and fighters with minimal strike ordanance...now we have the large resistance bombers so...how much can each carry?