If trading your heels for flats makes you feel somehow less pulled together, you probably just haven't found the right pair. Thanks to trends like sneakers, slides, and lace-ups, flats, now more than ever, are a mainstay in every fashion girl's wardrobe — and there's an influx of them in the marketplace too. From casual kick-back espadrilles to statement-making buckled styles or minimalist-perfect takes on the ballet slipper, there's quite literally something here for everyone and something you could very well wear anywhere — the office included. Just read on to take your pick.