Save on postage costs with this lightweight, bubble lined Jiffy Airkraft mailer. The lining is designed to be puncture and shock resistant to protect delicate or fragile items in transit. The mailer also features a strong, simple self-seal closure. These size 4 white mailers measure 240 x 320mm. This pack contains 50 white mailers. The bubble that inner lines the mailers is produced using a minimum of 30% recycled content.