Min size is 60/64 Gigs, which I do not recommend.
My Min recommended size is 80/90 Gig with the recommended size being 120/124 gigs.
You have to remember that the "user" size is about 10 ->15% less than the advertized size. First you lose out because manuf use base 10 to count, Computers use Base 2 - Why begcause it make the drive SOUND larger (Same for HDDs) - marketing tool. ie a 60 gig dive is only about 56 Gigs. Second, as with HDDs you never want to fill them up. Basically very simular reason: HDDs need space so defrag can run, SSD - So Trim and Garbage collector can work their magic. So 60 quicky becomes agout 50 gigs.