Here's a perfect example of how a smaller, skinny guy can make a fairly big dick look much bigger than it actually is. He's packing a 6.5 inch non-bone-pressed penis, and 7 inches bone-pressed (if I'm being generous). How do I know? On his blog he has a picture comparing himself to a Bic lighter. A Bic lighter is exactly three inches long. You can fit two along the top of his penis, with room for another half inch (or slightly more).
That's still an above average penis. Big even. But it looks much bigger. Not knocking the guy, he's hot, has a great body, and nothing to worry about, I'm just pointing out my observation. Let's get realistic about size people. Goes to show you how big an 8 incher really is, and how truly massive (and rare) a 9 incher is.