A5/C5 Rigid Book Mailers – Heavy Duty Cardboard Envelopes | Bend-Proof, Self-Seal, Eco-Friendly Packaging for Books, Documents & Media | Protective Kraft Mailers for Safe Shipping Premium 400GSM (10)

• Extra Strong 400gsm Protection: Made from premium 400gsm rigid cardboard, these book mailers 180mm x 235mm - A5/C5 and rigid envelopes provide exceptional bend resistance and crush protection — ideal for posting books, magazines, and important documents safely.
• 🔒 Secure Self-Seal Adhesive Closure: Features a peel-and-seal adhesive strip for fast, reliable packing — no extra tape required. Ensures tamper-proof and professional packaging for Amazon FBA, eBay sellers, and online shops.
• 🌿 Eco-Friendly & Fully Recyclable: Constructed from 100% recyclable kraft paperboard, plastic-free and biodegradable. A sustainable packaging solution for eco-conscious businesses and zero-waste shipping.
• 📚 Multi-Purpose Rigid Mailers: Perfect for books, photos, artwork, prints, comics, calendars, certificates, brochures, and DVDs. Versatile flat mailer envelopes suitable for eCommerce packaging, postal services, and office use.
• 💼 Lightweight, Durable & Cost-Effective: Engineered to save on postage costs while offering maximum protection. Ideal postal envelopes for bookshops, stationery stores, and small business packaging.
• ✨ Professional Finish & Customer-Friendly Design: Smooth kraft exterior for easy labelling or branding. Includes easy-tear opening for hassle-free customer experience and premium unboxing appeal.

180mm x 235mm - C5 Cardboard Book Mailers Ship your books and documents with confidence using our Premium 400gsm Rigid Book Mailers. Designed for maximum strength and protection, these heavy-duty cardboard envelopes are perfect for eCommerce sellers, online retailers, and small businesses that value presentation and reliability. Each kraft mailer is made from high-density 400gsm board, ensuring your items stay flat, crease-free, and protected from impact during transit. The self-seal adhesive strip provides a fast, secure closure, while the tear-open tab delivers a professional unboxing experience. Ideal for Amazon FBA packaging, eBay sales, or postal shipping, these eco-friendly mailers are fully recyclable, helping you reduce waste without compromising performance. Choose our book packaging envelopes for durable, sustainable, and smart shipping — because your items deserve to arrive in perfect condition every time.