The #7 Air Kraft Self Seal Air Bubble Mailers are designed for secure and efficient shipping. Each mailer measures 14 1/4″ x 20″ and comes in a convenient case of 50 pieces. The self-seal design ensures that once the mailer is sealed, it cannot be opened without damaging the contents. These mailers provide excellent protection for products during shipping, making them ideal for businesses and individuals who need to send items in a secure and reliable manner.