Looking taller is all about getting viewers’ eyes to travel smoothly up your body. It’s pure illusion: the more their eyes have to sweep upward, the taller their brains will register whatever they’re looking at as being.
That means that a shorter man wants to ease and encourage the viewer’s eyes upward towards his face. Visual clutter–such as eye-grabbing stuff on the body–breaks up the impression of height. That means staying away from obvious accessories like big, chunky watches, but it also means keeping an eye out for things as simple as the pockets on your suits and shirts. Something as simple as a pocket flap instead of an unadorned slit pocket can clutter up your appearance and lessen the impression of height.