A man in a three-piece suit is a man who knows what he's doing. You may wear your go-to work suit to a negotiation, but you'll want to rock a three-piece at signing. Fortunately, it's not hard to pull off the look if you know where to find the right goods. We've done that part for you. As for what to do when you're pulling on your modern suit of armor, just keep these three things in mind:
No. 1: The bottom of the waistcoat should always completely cover the waistband of your trousers. Too short and your shirt will billow and bunch out below the sides of your vest.
No. 2: The width of your tie should be directly proportional to the width of your lapels: skinny tie, narrow lapels, and vice versa.
No. 3: The buttons on the vest follow the same rules as the jacket: The bottom one is always left undone. Legend has it the trend began with England's Edward VII in the late 19th century.