This is just a couple of quick manips I did of Henry Cavill in the shape I think he should be in to portray Superman. Hopefully, physically, he's somewhere around this size. Recent photos of him at Comic Con didn't really give us much of an idea of how much bigger he's gotten with the loose shirt he had on.
I don't think this is too big. A little bigger wouldn't be that bad either. But I think it's just right if you ask me. Wouldn't be attracting any suspicion that he might be Superman when he's disguised as Clark Kent.