Oya Costumes provides a wide range of choices for children and adults. Online store for Canada’s best Halloween Costumes and accessories for kids, batman costumes teenagers and adults. This costume is available for kids and adults. They make their own costume or they buy one, already made. Drawn by artist Christian Cordella for costume designer Judianna Makovsky, the post features some of the first designs for Harley’s dress in the film and her uniform worn at the beginning.