C5+(B5) 194 x 292mm Capacity Book Mailers Cardboard Letter Envelopes Peel & Seal Postals for Royal Mail Rigid Posting Card (25)

C5+(B5)-194 x 292mm Extra Strong 400gsm Protection: Made from premium 400gsm rigid cardboard, these book mailers 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.