Stitch the zipper down using a zipper foot. Once everything is all cut out, separate the two sides of your zipper and begin to pin them in. Will she nab a coveted spot among the first 100 registrants for the BlizzCon costume contest? Justin remembers being somewhat of a kid, himself, black widow costume adults when he first began cosplaying. You will want to turn under the shirt fabric just a bit to hide the raw edges.