18 x 24" White Stayflats® Mailers

White Stayflats® Mailers in the 18 x 24 inch size are constructed from white chipboard that resists bending and flexing without requiring separate stiffeners. The integrated tab lock closure seals the mailer securely without tape or additional fasteners, keeping flat contents protected from dispatch through delivery.

The 18 x 24 inch interior suits large-format flat items including architectural drawings, photographs, posters, presentation boards, and apparel. The clean white exterior supports customer-facing shipments where professional presentation matters, making these mailers a practical choice for e-commerce retailers, print fulfillment houses, and wholesale distributors.

Chipboard construction keeps unit weight low, which helps manage postage costs at volume. Each case contains 50 mailers. The Stayflats® format is an established industry standard for rigid flat mailers, offering a lighter-weight alternative to corrugated options when a lower-profile solution is preferred.