The 12 1/4 x 9 3/4 inch White Side-Loading Stayflats Lite® Mailers are rigid flat mailers constructed from white chipboard, providing built-in stiffness that eliminates the need for separate stiffener inserts. The side-loading configuration lets contents slide in and out quickly, and the peel-and-seal adhesive strip closes the mailer without tape or additional supplies. A pull-tab tear strip gives recipients a clean, tool-free opening experience.

These mailers are well suited for document fulfillment houses, photo labs, print shops, legal and financial service firms, and retail e-commerce operations shipping certificates, artwork, or promotional prints. Any application that demands bend-free, presentation-quality delivery benefits from the chipboard's inherent rigidity.

The lightweight chipboard construction keeps postage weight lower than heavier rigid mailer formats, supporting cost efficiency in ongoing flat-item shipping programs. Mailers are parcel-friendly and sold in cases of 100, making them practical for regular replenishment in warehouse and office shipping environments.