Yes, confirmed by a couple of security people, Tom Cruise is small framed and around 5'7. But is somewhat athletic, had been doing a lot of his own stunts, don't know about currently...he's getting older now.
Piven is around the same height, given a inch or so. Tends to want to take over a set when working and can be annoying I have been told.
Ignore any PR releases from the studios, mag/TV profiles, stills, that are given out. The movie going public can't handle the truth. Standing in line behind Jessica Biel last year, at a Los Feliz market...very plain looking I must say. Kind of bummed me out, really. She's a little less than 5'8 or so..in sandals.