To be frank, I am not truly looking at the size, I am looking at the sheer detail that this drawing depicts. And Also, we do not truly know what is going on in the picture, not the whole story, only a sing part of a bigger whole. That and anybody can make their own universe and make Optimus as big as they want to. However, according to other people, I would have to agree, he would be too big. But otherwise, I admire the detail, realism, and imagination of the illustrator.