hi soupnazi, you'll mainly need to increase the outseam length and the rise of the pants. therefore, if you're wearing the pants an inch or so higher, you'll need to increase the outseam and rise by an inch too. however, i'd recommend to wear tuxedo pants at the same location as your other pants. there's no fixed rule. go what you're comfortable with. hope this helps. j.
11/22/12 at 10:29pm