MM6 Maison Margiela’s oversized blue and white-striped shirtdress is part of the label’s whimsical Resort 2019 collection, which presents scaled-up vintage childrenswear. It’s Italian-crafted from lightweight cotton poplin and features a Peter Pan collar and pleated trims down the front placket and around the cropped cuffs. Take a modern stance and layer it over a roll-neck top with the house's signature Tabi boots.