I've sorta stymied myself with a fairly simple question here: Can Medium characters wield Small crossbows? I've gone looking and found a fair amount of discussion on the reverse (characters wielding crossbows sized for larger users), but nothing on this. The issue I'm getting stuck on is that crossbows are generally two-handed weapons, but can be wielded one-handed, so I can work my way to either a "yes" or "no" answer with equal parts certainty and hesitation.
Here's the answers I've tentatively settled on for now; tell me your thoughts.
Hand & Light Crossbow: When wielded one-handed, both of these weapons are treated as light weapons, so my inclination is that these weapons are too small to be used by a larger wielder.
Heavy Crossbow: When wielded one-handed, this weapon is treated as a one-handed weapon, so perhaps it's possible, treating it as a light weapon?
Either way, regardless of size, I'm confident that you always need to use two hands to load a crossbow regardless of how small it might be.
If anyone's curious, I'm running a variant version of Sewer Dragons of Absalom as a home game, and the question arose when it came to looting some height-challenged baddies.