Admittedly my search fu is weak -- WEAK! -- but I wasn't able to track down an official ruling from one of the good folks at Paizo on whether or not magical items resize themselves to adapt to the user/wearer/poor cursed slob. I've found discussions of this from previous editions, but nothing particular to Pathfinder. Has there been official word on this that I'm not aware of, or are we flyin' blind here?
I have not read. My DM lets things resize. I am a real prick on things like that. Don't resize size is a percent roll on armor and so forth.
From here
Size and Magic Items
When an article of magic clothing or jewelry is discovered, most of the time size shouldn't be an issue. Many magic garments are made to be easily adjustable, or they adjust themselves magically to the wearer. Size should not keep characters of various kinds from using magic items.There may be rare exceptions, especially with race-specific items.
Armor and Weapon Sizes: Armor and weapons that are found at random have a 30% chance of being Small (01–30), a 60% chance of being Medium (31–90), and a 10% chance of being any other size (91–100).
Well then, that was easy.
Curse you, Core Rule Book! Curse you and your answers I could easily have found without posting on the forums!