Lightweight trading card mailers made from thin cardboard for a close-fitting design Each mailer measures 7″ x 4.35″ and is 0.04″ thick Each piece weighs under 0.4 oz. Made to ship cards stored in semi-rigid holders or toploaders Sized to fall within Standard Envelope shipping program guidelines Constructed from thin white cardboard with a multi-color printed exterior Provides a clean, professional presentation while helping protect cards from shipping dings Developed with trading card collectors in mind to support efficient card shipping