#2. Shoes

Don't even think about flats with a dress like this. You need heels -- preferably high ones. The ones Charlize is wearing are fabulous -- the ankle strap really plays up the flapper look, but they're funky enough to bring a modern edge. However, if you have thicker ankles or are worried about your legs looking squatty, opt for a shoe without an ankle strap -- this will elongate the look of the leg and add to a slimmer overall effect.