White Paperboard Rigid Mailers, Stay Flat Chipboard Envelopes, 100 Count, 13 x 18 in

Ensure your valuable documents and fragile photographs reach their destination in pristine condition with these heavy-duty white paperboard rigid mailers that provide ultimate protection against bending and crushing.

Shipping oversized items like art prints, legal documents, or marketing materials requires a reliable solution that maintains professional presentation while offering superior structural integrity. These 13 x 18 inch stay flat box mailers are crafted from high-quality 550 GSM chipboard, creating a robust barrier that resists folding or creasing during the rigors of transit. By choosing these no-bend self-sealing business mailing envelopes, you eliminate the stress of damaged shipments and the cost of replacements. The clean white exterior offers a sleek, professional look that enhances your brand image, while the convenient peel-and-seal closure saves time in high-volume shipping environments. Perfect for photographers, artists, and business professionals, these 13x18 rigid mailers accommodate large-format contents with ease. The opaque fiberboard ensures privacy for sensitive documents, while the lightweight design helps minimize postage costs without sacrificing strength. Whether you are sending certificates, calendars, or promotional posters, these envelopes offer the peace of mind that your contents will arrive as flat as the day they were packed. - Robust 550 GSM Construction: The heavy-duty chipboard material provides a high-strength, rigid structure that effectively prevents bending and keeps your contents perfectly flat.
- Secure Self-Seal Closure: An integrated adhesive strip with a peel-off backing ensures a quick and permanent seal, streamlining your packaging process and providing tamper-evident security.
- Oversized 13 x 18 Inch Dimensions: These large-format mailers are specifically designed to accommodate oversized documents, art prints, and photos, making them ideal for specialized professional mailing needs.
- Professional White Exterior: The smooth white finish provides a clean and modern aesthetic that is easy to label or write on, ensuring your packages always look professional upon arrival.