<p>It’s usually not that difficult. A guy “typical of a university-age guy” is a 32" waist. There are standard suit sizes to fit that. If the guy has some unique aspects to his size (neck sits to the front, barrel chest, big arms, put belly, etc) then the suit is taken out by a tailor to fit. There are short and long sizes to fit, as well. All paints are finished after purchased, so they always have the right length.</p>