"No. This is a knife." The weapon system of D&D, in general, makes us feel pretty good. There are ample reasons to use weapons as diverse as a flail, a warhammer, and a morningstar. There are, however, some glaring problems that do need to be addressed. The most obvious of those is Weapon Size, which works very badly on every level. The 3rd edition rules were not good, and the 3.5 changes to them made them worse in every single way. So here's the big deal: Weapons don't have special size rules anymore. In 3rd edition a Shortsword was a small weapon, and in 3.5 it's supposed to be a Medium Light Weapon, but that's all stupid. The fact is, a Shortsword is a Tiny Object, and that's all we need to know.