Sturdy Corrugated Cardboard Jewel Case Mailers. Mailer exterior color: white.Made from 400 gram cardboard, ensures that your jewel case arrives safely. Exterior is white, interior is brown.Simply place the jewel case in the middle of the inside of the mailer, fold the mailer into place around the jewel case, and then insert the cardboard closure tab into the tab slit, and that allows you to close and seal the mailer for shipping. Then, apply mailing label, postage and ship it. Dimensions: approximately 5" x 5 1/2" x 5/8" (when closed).The sturdy, corrugated, cardboard jewel case mailer is designed to hold one standard jewel cases (or up to two ultra-slim jewel cases).