I want to say ditto about looking shorter the bigger you get, it's a ratio thing. Some say it's the other way around, who knows. I'm 6'2", I'd have to weigh 280 to look as big as you- according to the standard ancedotal calculations. A buddy of mine is 6'7" with scoliosis (so, he slumps and with a straight spine would be 6'9" or so) and has a hell of a time looking bigger. When we started training together he weighed 185 lbs which was bone thin for a guy his height. He's about 220 now and still looks skinny, now that's rough! lol. He's a good dude and busts his ass, and it makes me feel like my ectomorphic ass has it easy!
I bought a pair of Doc Martin boots last year, workboot style. I'd never tried on a shoe that fit me so damned well, so I had to buy them. They're great boots. But, since I have a fallen arch and bad knees as a result, I put in a special arch support insole which added a bit to the already 2" or so heel on those things. When I wear them people think I'm 6'4" or 6'5" easy! lol. Then, when I wear sandals everyone thinks I shrink in summer!