Custom Tuck Top Mailer Boxes from Mailer Boxes Co are a self-locking shipping format where the top flap tucks into the front panel to close the box securely without tape or glue. The most widely used mailer box style in US ecommerce and subscription fulfillment. Available in any custom size with full-color exterior and interior printing, kraft or white corrugated stock, and finishing options including matte, gloss, and spot UV. From $0.35 per unit. Free USA shipping on every order. Shop Now : https://mailerboxesco.com/product/tuck-top-mailer-boxes/