Originally Posted by JB-the-Hunter
They definitely at least a few heads taller than the other characters.
I suggest an image search for Yao Ming. He is 7'6 and has a he has a few heads over guys 6'3 (Hemsworth's listed height). Those that Thor does battle with look to be about 2 feet taller them him at most. Even if they were three feet taller then him, and they really don't look it, that would make them 9 feet tall. They look about 8 feet tall.