Even for those who didn’t see 2016’s superhero blockbuster Suicide Squad, the style of one of its characters became all but ubiquitous—especially when that year’s Halloween festivities rolled around. We’re talking, of course, about Harley Quinn, and the signature costume of Margot Robbie’s deranged antihero: dip-dye pigtails, a ripped tee, fishnet tights, and a baseball bat slung over the shoulder.