Kraft Bubble Mailers stay flat during shipping and use air bubbles to protect your contents from being damaged. These Padded Kraft Bubble Mailers have a self seal strip to secure them instantly and also have a pull tab tear strip for easy opening and tamper evidence. Help secure your items for safe delivery and get your items to their location as intended. Heavy duty 55 lb. kraft paper is combined with a sturdy bubble liner to create a premium mailer. Manufactured with a 1/4 inch tolerance and a 3/16 inch bubble size. Please note that the listed dimensions are the inner dimensions which state the usable space.