This baby Flash costume transforms your tot into the lightning fast superhero from the original DC comic book series. The baby Flash costume includes a romper with under leg snap closure and lightning accent headpiece. This Halloween, remember that the Flash always makes a perfect baby Halloween costume idea. Newborn size (0-9). Availability: This baby Flash costume takes approximately 1 to 2 business days to leave the warehouse plus transit time. Please allow additional processing time during peak holiday season.