{"product_id":"cardboard-envelopes","title":"Cardboard Envelopes","description":"\u003cp\u003eOur \u003cb\u003eCardboard Envelopes\u003c\/b\u003e (also known as corrugated mailers, fluted cardboard envelopes, or eco padded envelopes) are a robust, sustainable packaging solution tailored for UK e-commerce sellers, online retailers, small businesses, and professional mailers who need lightweight yet cushioned protection for books, documents, small parts, media items, and other semi-fragile goods during postal or courier shipping.\u003c\/p\u003e\n\u003cp\u003eConstructed from high-quality single-wall corrugated cardboard (featuring a protective fluted inner layer for added cushioning and rigidity, often with a kraft exterior), these envelopes combine the strength of rigid mailers with built-in shock absorption—offering better impact resistance and crush protection than standard padded bubble envelopes or plain paper mailers, while remaining fully recyclable and plastic-free.\u003c\/p\u003e\n\u003cp\u003eKey features and benefits include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eEnhanced cushioned protection\u003c\/b\u003e — The corrugated fluting provides excellent resistance to impacts, bending, crushing, and transit vibrations from handling, sorting machines, conveyor belts, or multi-drop journeys—ideal for paperback books, magazines, catalogues, small electronics accessories, cosmetics, jewellery boxes, thin hardware, or documents that benefit from extra padding without needing separate bubble wrap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRoyal Mail and carrier optimisation\u003c\/b\u003e — Many sizes are designed to fit within \u003cb\u003eRoyal Mail Large Letter\u003c\/b\u003e limits (max 353 × 250 × 25mm, up to 750g) for lower letter-rate postage savings, or Small Parcel tiers for slightly thicker contents—helping keep costs down on platforms like eBay, Etsy, Amazon, or your own website. Popular options include A5-compatible (around 215 × 150mm), A4 (e.g., 278 × 400mm or 303 × 413mm with gussets), and expandable variants up to 40–55mm depth for added capacity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eExpandable and versatile\u003c\/b\u003e — Features side gussets or expandable bases (often 30–55mm) allow accommodation of varying thicknesses, turning the envelope into a mini-box for bulkier items while maintaining a flat profile for easier posting. Perfect for everyday e-commerce products like apparel samples, beauty items, stationery sets, or bundled documents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eQuick and secure packing\u003c\/b\u003e — Supplied flat-packed for efficient, space-saving storage; fast to load with peel-and-seal adhesive strips (self-adhesive\/hot-melt) for reliable, tape-free closure in high-volume fulfilment centres, 3PL operations, or home-based setups. Many include easy-open tear strips for a customer-friendly unboxing experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProfessional and eco-conscious appearance\u003c\/b\u003e — Available in natural kraft brown (sustainable and rustic look) for a clean, premium vibe. Smooth surfaces accept high-quality labels, direct printing, or custom branding (logos, thank-you messages, or barcodes), enhancing perceived value, encouraging positive reviews, and aligning with UK sustainability goals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFully sustainable\u003c\/b\u003e — Made from responsibly sourced, 100% recyclable corrugated materials (often with high post-consumer recycled content), supporting circular economy practices and helping your business meet eco-friendly targets without compromising on durability or performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReliable with major carriers\u003c\/b\u003e — Engineered for consistent performance with Royal Mail (Large Letter or Small Parcel), Parcelforce, Evri, DPD, Yodel, UPS, and DHL—reducing damage risks, claims, or returns.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBest suited for non-fragile to moderately protected items requiring cushioning and rigidity, such as books, media, or small goods. For purely rigid flat protection (no cushioning needed), consider our board backed envelopes; for heavier books or greater depth, explore rigid book mailers or double-wall options.\u003c\/p\u003e\n\u003cp\u003eChoose our cardboard envelopes for dependable, cost-effective, and environmentally friendly packaging that cushions your products reliably.\u003c\/p\u003e","brand":"BoxPac","offers":[{"title":"150 x 250mm","offer_id":53351677788424,"sku":"BP2201","price":12.68,"currency_code":"GBP","in_stock":true},{"title":"185 x 270mm","offer_id":56304294494472,"sku":"BP2202","price":15.21,"currency_code":"GBP","in_stock":true},{"title":"215 x 300mm","offer_id":56304294527240,"sku":"BP2203","price":17.36,"currency_code":"GBP","in_stock":true},{"title":"235 x 340mm","offer_id":56304294560008,"sku":"BP2204","price":18.33,"currency_code":"GBP","in_stock":true},{"title":"340 x 500mm","offer_id":56304294592776,"sku":"BP2205","price":31.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1022\/1571\/3032\/files\/cardboard-envelopes-6.jpg?v=1771519851","url":"https:\/\/www.boxpac.net\/products\/cardboard-envelopes","provider":"BoxPac","version":"1.0","type":"link"}