The wide peak lapel was a staple of Atlantic City gangsters, and those guys were onto something: The V shape makes you look as though you're in charge, even if you're the new guy. Today's version strikes the same masculine vibe but is slimmer and best served with a narrow tie, small-collar shirt, and simple, classic shoes (like laceless monk-strap loafers). This mod-style Calvin Klein Collection wool suit is the opposite of over-the-top excess but still conveys power.

Peak-lapel gray suit, $1,350, and shirt, $250, both by Calvin Klein Collection; pencil-stripe tie, $15, and linen pocket square, $10, both by Tie Bar; shoes by Jack Erwin, $195; socks by Pantherella, $30