3 of 4 no need to signal edits: see https://rpg.meta.stackexchange.com/q/3454/23970

Smaller weapons as light weapons?

My question is simple: If, let's say, a Medium character wields a Small Rapier in his off-hand, does it count as a Light Weapon? After all, it should be easier to wield, or is it not because it is made for Small characters, and not Medium?

I'm playing the Pathfinder RPG system. We are using all the books, except Technology guide.