The depth of your business wardrobe really depends on two things: the demands of your job and your sense of style. On average, most guys should own at least four to six suits, with variation depending on several factors. If you’re with a laid back company without too many social engagements, you can probably get away with two to three suits – solid charcoal, solid navy and maybe a subtle pinstripe. If you work in a professional services environment, like finance or law, you most likely want to have nine to twelve suits. Build your wardrobe around a solid foundation of versatile, well-made suits and then expand based on personal style, work demands and geographic conditions.