The 13 x 18 inch Kraft Self-Seal Stayflats Plus® Mailers are rigid flat mailers constructed from .028 kraft chipboard, delivering structural stiffness that protects flat contents in transit without requiring insert boards or corrugated backers. The self-contained rigidity keeps packaging prep simple and material costs low.

These mailers are well suited for e-commerce retailers, print studios, photographers, and distributors shipping large-format documents, artwork, prints, and photos that cannot be bent or folded. The interior accommodates standard large-format materials and is a common fit for architectural drawings, presentation prints, and framed photo orders.

The peel-and-seal self-adhesive closure bonds securely without moisture activation, and a pull-tab tear strip allows recipients to open the mailer cleanly without tools. The lightweight chipboard construction helps manage postage costs at volume. Sold in cases of 100.