Ballet flats have been an essential addition to any fashion-conscious woman’s wardrobe since Audrey Hepburn and Brigette Bardot popularised them in the ‘50s. If they’re good enough for those Hollywood icons, they’re good enough for us — but ballet flats have plenty of selling points besides their celebrity fans. Chief among them: They’re supremely comfortable but don’t sacrifice even an inch of style; they can be elegant but low-key, like Roger Vivier’s collection; or they can add excitement and sparkle to a look, like Miu Miu’s.