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Pants that are slightly fitted in the thigh and follow--but don't cling to--the line of the calf will look clean and sharp without calling attention to narrow calves. Pleated pants may add some volume, but can puff up and look strange when you sit.  Skinny jeans or tapered pants will make your legs look like toothpicks and should be avoided.  Flared or boot-cut pants may disguise a skinny calf, but they tend to look sloppy on men. Though you may think that baggy or big clothes are disguising your thin legs, it's actually calling attention to them. If it looks like you can't fill out your pants or they're two sizes too big, it just makes your legs appear smaller. This goes for accessories, too. A huge belt or belt buckle may overwhelm your lower half. Instead, try an eye-catching pattern on your shirt or tie to draw attention away from your legs. Pinstripes are a no-no since they'll only make your legs look longer and skinnier. Dark colors have a slimming effect, so choose jeans in a lighter wash and try light gray, beige, or khaki trousers instead of black. A long jacket can make your legs look extra long and skinny, and a shorter jacket won't look proportional and can even appear childish.
Wear straight-legged pants with a flat front. Choose clothes that are tailored or fitted, but not tight or super baggy. Wear light colors and horizontal stripes. Choose fitted jackets that hit at your hip.