Everyday business attire may have become more casual, but the suit is still the anchor of any man's formal wardrobe. Start with a classic navy suit. Step 1. Choose a jacket style. The two-button, single-breasted jacket is a popular style, but three- or four-button jackets are also available. Keep in mind that fashions change for men's clothing, just as they do for women's. Only thin men should wear formal double-breasted jackets, which add bulk to the figure.
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