Seems to me that he's 5'3" -- or less -- with very long arms, relatively speaking. His fingers are almost touching his knees. The fact that those arms are over-developed is what makes him look so strange.
He also has a very small head.
That's certainly not a wonderful physique, because his proportions are freakish in a bad way; he has the proportions of a Morlock, or an Orc. The Apollo Belvedere he certainly is not.
...But he can't change the hand he was dealt, and you've gotta give him credit for making the most of what he's got!