These days, dress codes can be a little confusing, but a blazer can translate from smart casual to business formal,  says fashion stylist Christina Stein. She notes that, since a blazer is so versatile, it's one of the best investments you can make in your wardrobe.

There are two main blazer styles you will come across while shopping: single- and double-breasted. Single-breasted blazers and suit jackets tend to have one, two, or three buttons, but you might find one with four or five.