Sorry for the necro, but I just spotted something similar. It's not specifically mentioned here so I'll post.
When you equip weapons on Pallegina, the weapon models are small when sheathed but enlarge in size when wielded. This is different to what's going with what a few posters have mentioned here so either something's changed since then (patch?), or something specific is going on with either Pallegina specifically or all human female models.
This is a weird concept though as I don't see the point in coding for the weapon to enlarge when unsheathed. It's great that the models are smaller on the more petite characters so that, for example, long weapons like pikes won't clip into the ground; makes perfect sense. But the weapon enlarging when they pull it out is not a good look unless there's a reason, e.g. magically engineered to do so.
I guess, as BMac mentioned, it's not moddable so I'll just have to live with it.
EDIT: I just realised that all weapons increase in size when unsheathed and wielded, no matter what race the character is. Can't unsee now.