Via artofmanliness.com : Good work men.
10 Tips on Dressing Taller
FYI – I put these ten tips in orders of practicality and cost. I realize some of these are beyond some men’s resources or not options worth considering–but I lay them out there so that you can make that decision yourself.
1. Monochromatic Color Themes
Along the same lines as minimizing visual clutter, removing contrasting color from your appearance helps streamline the way you look. Keeping all your clothes within a fairly consistent color theme, especially a dark one, will create an illusion of height. Different color shades are fine–just try to keep it loosely monochrome.
When you do wear different colors or different shades of the same color, try to weight the darker colors toward the bottom half of your body. That way people’s attention starts down near your feet and travels upward. Dark trousers with a lighter shirt create a lengthening effect; a darker shirt with lighter pants shortens your appearance.