It’s created by an American girl, who is known as CassiniCloset or Cassini Inuebony at DA. Before you start Googling every costume under the sun, batman costumes hone in on who you want to be this spooky season. She has also become a popular subject of cosplay, causing a trend in Japan where women attempted to replicate her iconic costume. From the crotch to the hem, it’s 28inches long.