8 1/2 x 10 1/2 #2 Jiffy Rigi Bag® Mailers. These mailers provide superior corner and edge protection. Kraft laminated fiberboard construction prevents movement of contents and resists bending folding and creasing. No need for additional stiffeners. Mailer features a high strength cohesive self-seal flap. Simply insert contents and fold over. Tear strip for easy opening.