Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
As indicated most 2.5" SATA drives should work. The missing bit of factoid is what is the target machine. For example, on the 15" non-unibody MBPs you were limited to the height or thickness of the drive (9.5 mm max if I recall).

Neil
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.