Most people will recognize the red, white and blue colors of a Wonder Woman costume. Become this famous female superhero this Halloween! Make your own Wonder Woman costume or buy one online. You will need a red cape and any pair of boots that have red or blue on them. eBay is a good place to find a discount Wonder Woman costume. Some sellers offer free shipping. Here are some of today’s eBay listings for Wonder Woman costumes: You can even dress up your dog as Wonder Woman with a pet costume! You can find adult and child Wonder Woman costumes at eBay.