I thought I posted on this earlier but it seems I'm to dumb to press submit.
The the person asking about how much they should weigh at x height. I think the best indicator of thickness is lbs/inch of height. For a leanish type physique anything above 3.0 you would be pretty big. Off season Ronnie Coleman(at 330 or so lbs) on I think 5'10 comes in at about 4.7,so that's a big boy haha.
There are severals factors that contribute to how much someone looks like they weigh. Number one I would say(especially in clothes) would be structurally how wide the clavicle is vs waist. Even in clothes you can see it and it makes someone appear much more massive if the shoulders are very wide, with our without a ton of muscle. If you are narrow shouldered and or have a wide waist you won't have the same imposing look as somone of the same weight who does. After that what is developed plays a role, my traps forearms and calves are strong points and therefore I look pretty big in shorts and a t shirt. Currently I'm about 207 but most people think I'm 230. If someone has tree trunk legs and a weak upper body in clothes they are going to appear to weigh much less than someone with a massive upper body and smaller legs.
Now when the clothes come off there are other factors on top of those. Most important without a doubt is leanness and that should be fairly self explanatory. Joint size is also very important, you put a 17 inch calf on a guy with huge ankles and knees and it looks solid, you put that same calf on someone with tiny ankles and knees and it looks like a football was inserted in there. Same muscle, much different looks. Also muscle belly length and fullness contributes greatly to the look. You put full muscle bellies with small joints on a lean well developed individual with good bodybuilding structure and you've got someone who will look really damn impressive with our without clothes on.
You can't change some of those things like muscle belly length or joints or for the most part your clavicles etc, but the things you can control are muscle size(espeically in the right spots) and leanness. In my opinion people can't(without SEO or other site injection protocals) overdevelop side delts or upper lats, and you can't have too small of a waist.