Thats not a leader class. I'd say he is voyager class. Screws heads are big. They'd appear smaller if the figure was bigger. http://www.tfw2005.com/transformers...f-Extinction-Optimus-Prime-057_1381360870.jpg If you examine the pictures where the photographer took pictures of the back, you'll notice that his arm and camera strap are in the shot. So you are able to do a comparison. That strap is about 3/4-1" wide. My estimate says that Prime is probably around 7" tall. I think he'd go well with Robo-vision Optimus.