how small do you want it? pocket sized or larger?
if you want a pocket sized .380, do you want to carry in condition 1 or condition 2? if you want to carry in condition 1 (or wouldn't mind carrying in condition 1), i'd recommend the SIG P238. it's so much nicer to shoot than the other pocket .380's and actually has real sights.
if you want to carry in condition 2, well, then you can pretty much take your pick of a bunch of them. LCP, TCP, P3AT, MDE, etc. I have a LCP which has functioned flawlessly since day 1, but I don't really think it's any better than any of the other pocket .380's.
if you want a larger .380, can i ask why? if you move up a size, you're now in the realm of some 9mm's, so you might as well get a 9mm.