Impeccably dressed men come in many shapes and sizes, but they have one thing in common: They know the rules for wearing a suit. And here are those rules: 103 in all, including the four looks every guy should own, what to consider before you buy, how to pick shirt-and-tie combos, the correct amount of shirt cuff to show, which watches to wear, and more. Plus: stylish updates on classic dress shoes, essential advice from Savile Row's smartest tailor, the best tailors in America, and what the stars can teach you about looking great in a suit.