Self-Seal Padded Mailers #4 provide great protection. End flaps of mailers are coated with a rubber adhesive that only adheres to itself and keeps contents secure during transportation. Mailers self-seal and are easy to use. Tear-seam tab allows for easy opening by the customer. Mailers are moisture resistant and do not require additional cushioning. Inside dimensions are 9 3/8 x 13 1/4".