Searching for a look that doesn’t get out of line and follows orders? If so, the Military Mustache is the one for you. Some branches of the military require that a mustache not extend beyond the corners of the mouth horizontally or vertically, and should not conceal any part of the upper lip. Some even require individual whiskers to be less than a half-inch. Unless you’re enlisted, however, you can grow it out a bit more and adhere to your own regulations.