A Batgirl costume is so fun for girls and women to wear! You can find purple and yellow child’s batgirl costume, pink and silver child’s batgirl costume and even an adult woman sexy batgirl costume. All these batgirl costumes have three things in common: a cape, knee-high boots and the flying bat symbol on the front of the shirt. A good place to get a discount Batgirl costume is at eBay. Some sellers offer free shipping. Here are some of today’s eBay listings for a Batgirl Halloween costume: Gotham Girls Unite! We fly on Halloween night! Whether pink or purple, black or white, Batgirls give a fright!