Hemsworth's also a lot bigger than Schreiber, though. He looks like a big, jacked dude to me. So what if his arms don't have a 3-foot girth? We have unrealistic expectations of a normal man based on insanely exaggerated comic book art, which is a bit unfair to him. Maybe he's not precisely as enormous as some would like him, but he's not small by any measure. Thor will be a big guy. If he's not big enough for you, that's your problem. I'm more concerned with the effects, how they write him, etc.--you know, the things that will actually make him be Thor, as opposed to the degree he looks like Thor.