9.5 × 12.5 in Mailer

If you've ever had a customer open a package to find a bent photo or a creased certificate, you know that the mailer matters as much as what's inside. FlexTribe rigid mailers are engineered to eliminate that problem — heavy duty cardboard construction (420–450 GSM depending on size) that stays flat through sorting machines, rough handling, and the occasional rain.

The self-sealing adhesive strip means your team can pack and seal without reaching for tape, which adds up to real time savings at volume. And because the customer experience matters on both ends, each mailer includes a built-in tear strip for clean, damage-free opening — the kind of unboxing moment that earns five-star reviews. Every pack also ships with 200 adhesive 'Do Not Bend' stickers so carriers handle your packages accordingly.

These mailers are a staple for Etsy sellers shipping art prints, photographers sending proofs, e-commerce brands fulfilling subscription boxes, and office teams mailing documents and certificates. The clean white exterior is label-friendly and hand-writable, so addressing and branding are effortless. And when you're done, they're fully recyclable — a small win for your carbon footprint that your customers will notice.

• Bend proof protection on every shipment: 420–450 GSM cardboard construction (varies by size) keeps photos, prints, certificates, and documents perfectly flat from pickup to doorstep.
• Seal in seconds, no tape needed: The peel-and-seal adhesive strip closes fast and holds firm. Customers open clean with the built-in tear strip — no scissors, no damage.
• A professional look that reflects well on your brand: Crisp white finish gives every package a polished, business-ready appearance, whether you're sending one order or a hundred.
• Sizes for every flat item you ship: From small trading cards (6.5x4.5") to large magazine size mailers (12.75x15"), there's a FlexTribe size that fits without wasted space.
• Bulk packs built for real shipping volumes: Choose from different pack sizes available. The more you order, the more you save per mailer.
• Eco friendly and recyclable: Made from recyclable cardboard and shipped with 200 adhesive 'Do Not Bend' stickers per pack.

• Etsy & independent artists: Ship art prints, photography, and hand-drawn work knowing they'll arrive as flat as the day you created them.
• E-commerce brands & subscription boxes: Tuck promotional inserts, product flats, or subscription cards into mailers that keep everything looking intentional and professional.
• Photographers & studios: Send proofs, prints, and portfolios to clients without the anxiety of transit damage. The rigid structure protects your work; the white finish protects your brand.
• Offices shipping documents: Certificates, legal papers, blueprints, and contracts deserve a mailer that respects their importance. These do.
• eBay resellers & trading card sellers: The 6.5x4.5" size is purpose-built for trading cards and small collectibles that need a hard shell without bulk.