Helmut Lang and Prada both make clothes which are especially suitable for tall, lanky guys. In general, however, I would suggest that you wear clothing that is fairly well fitted rather than looking for a specific brand. Tall guys and short guys tend to wear baggy clothing believing that this disguises their height or lack thereof. In fact, the bagginess accentuates these characteristics. Specific recommendations: Boot cut jeans and pants. Tapered or straight legged jeans will make you look like you're on stilts. Bootlegged pants will lend stability. Horizontal stripes. A subtle horizontal pattern will cut de-emphasize your height somewhat. In fact, any pattern (paisley patterned shirts are cool) will do the trick and break up your height. Heavier materials, like moleskin and corduroy, provided than the particular garment fits well, may help. For shirts, stick with poplins, and stay clear of drapey garments. Make sure that the sleeves of your shirts and jackets and the legs of your pants are long enough. Break up your height with a thick leather belt. Stand up straight. Good posture makes the best of your height. Bad posture, the worst. For jackets, go with a 3/4 length style. A shorter jacket (i.e. waistlength) will give you the unwanted stilts effect. A Peacoat, doublebreasted and of a heavier boiled wool (Miu Miu and Prada made some nice ones last winter which you may find on sale somewhere) might look good. Good luck.