I'm not sure about the interchangeable clothing. My guess is that the game just takes the average for most situations and goes with that since there are no vanilla races with such extreme size difference one member to another. That would also explain human clothes being small, as it's going by the average size, which if I'm reading it right would be 150% the size of a human. Which is more than the difference between a human and a dwarf.
Average size, huh? So if instead of having a male caste with POPRATIO 20, and a female race with POPRATIO 1, I had twenty normal-size male castes, and a single big female caste? Do we have definite numbers on how close you have to be to have gear fit?
Or alternatively, I could just implement a half-sized / tiny runt caste, with popratio 1, and the others at 2000 and 100. Which also should work by that logic.
Unless the popratio matters, but then I shouldn't have the problem right now, right?
Does that make sense?
I also have a race that uses mostly multigrasp weapons, using them one handed still counts them as a weapon, but they have a big penalty to their rolls. Back before the changes to materials Toady said that it puts a big '0.5 X ...' in front of all the calculations when using a multigrasp that way. I imagine it's a similar modifier with the new system. I think they only stop counting as a weapon if you are below the absolute minimum size. But even then I wouldn't be surprised if adventure mode bends the rules for you.
Okay, that explains a lot. Both why I could do it, and why I could never do anything while doing it, even as a demigod.
It is possible to randomly be large enough to wield the weapon in one hand too, but there's no obvious way to tell. Best bet in adventure mode is to just drop everything in your hands and pick up your weapon and see what it defaults to.
There's very clearly a size requirement in the weapon raws, generally just above human-size.
(And while I'm here, my Durumgir cause DwarfTherapist to not connect. Why is that?