10 Best Box Mailers Flat

100PCS Mailing Box 220 x 160 x 77mm A5 BX1 B1 Die Cut Mailer

Redi-Strip Self-Sealing Stay Flat Mailers: Perfect for professionally shipping and storing valuble documents, artwork, posters, blueprints, photographs, and more
Quality Park 6" x 8" photo document mailers are made of extra rigid fiberboard for ideal protection
Redi-Strip provides a clean, quick seal immediately upon contact. Simply peel off the adhesive strip and press to seal. The peel-off strip protects the adhesive from dust for a longer shelf life.
Bright white envelopes made from 24 pt recycled fiberboard make a clean and professional presentation
Contains a convenient 25 count pack of envelopes provided by a trusted brand, Quality Park

📦 Multiple Sizes: Catering to a variety of items, from A4 & A5 documents to other goods with sizes ranging from 15X10X8CM to 31X23X10CM.
🛠️ User-Friendly Design: Our diecut pattern ensures easy folding and assembly, streamlining your packing process.
🔒 Reliable Protection: Crafted from sturdy paper and corrugated cardboard, these boxes offer dependable protection for your items during transit.
🎨 Neutral & Customizable: Plain brown exterior and interior present a professional look, ready for customization or labeling.
💼 Versatile Use: Ideal for business shipments, personal packages, or storage, these boxes are a practical choice for various needs.

Perfect for A3 Documents & Prints – Measures 440 x 320 x 20mm, ideal for sending flat artwork, certificates, posters, and other important documents safely.
Super-Flat & Efficient Design – Slim profile keeps contents secure and professional without extra bulk.
Rigid Cardboard – Strong, durable construction ensures your items arrive undamaged and pristine.
Self-Locking Die-Cut Style – Easy-to-use folding design keeps documents safe without tape or extra packaging.
Eco-Friendly & Practical – Plain white exterior with brown interior; optimized sizing reduces waste and minimizes your carbon footprint.

Versatile Packaging Solution: Our packaging box is a versatile packaging solution suitable for various products, from small electronics to clothing items, ensuring safe transit.
Easy Assembly: Featuring a user-friendly design, our mailing boxes are easy to assemble, reducing packing time and minimising labour costs. Tuck front self-locking.
Durable Construction: Crafted from high-quality corrugated cardboard, our mailing boxes offer exceptional durability, protecting your items from damage during shipping.
Secure Closure: Equipped with a secure closure mechanism, our mailing boxes ensure that your products remain intact during transit, providing peace of mind for both you and your customers.
Protective Cushioning: To further safeguard your items during shipping, our mailing boxes can be paired with cushioning materials such as bubble wrap or packing peanuts.