So, I’ve been watching a lot of One Piece, and one thing pisses me off above all: the body types. I mean, for the woman it’s bad enough, but even the men are ludicrously tall on average, and so homogeneous it drives me to tears. As a result, I’m taking a Homestuck approach to it, where it is all representative and not necessarily indicative of their appearance.
Luffy, I think, is really short. By the show’s standards he’s already pretty short, but at 5’ 8" he’s actually about average. I think of him, then, as more like 5’ 4", but he’s really not too sensitive about it. He would also be really fat if it weren’t for his abilities, which leads me to believe that they consume a whole load of energy. Non-filler Luffy is never totally brain dead, which leads me to believe there’s some reason that he’s so hungry all the time.
Zoro is probably around average height, and very very muscular. I mean, the dude is crazy strong, and unlike Luffy, he’s mostly human which means that he can’t just pull amazing strength from nowhere: that’s the result of lots of hard work (not to imply that Luffy hasn’t worked hard, but he worked harder at bringing out his strength, and less on building it up).
Nami I imagine as actually being really short. She actually very rarely get comments on her looks (except for girl-crazy Sanji), so I don’t think that’s she's that attractive. However, she’s probably got a relatively nice rack, based on the “happiness punch” and what she charged for it. So probably of about average build, except a bit shorter (about as short as Luffy, about 5’ 4" or 5’ 3").
Usopp is probably a bit on the short side, 5’ 7" or so. I also imagine him as a little bit pudgy, but not incredibly so, because it’s more based on lack of excercise than genetics or anything, just a bit of fat that hangs around. However, is frame is naturally really really thin anyways, so it usually goes unnoticed.
Sanji, on the other hand, is string-bean thin. Because his fighting style is way more about agility, he’s got very toned, relatively small muscles that do not bulge almost at all. He’s also easiest the tallest of the crew, 6'1" or 6’ 2"..He also spends the most time on grooming, even moroe than Nami, so his hair is always perfect.
I don’t have anything for Chopper or Nico Robin. Maybe more for Nico Robin later, but nothing yet.