A5 / A3 Size Cardboard Envelope Mailer - Expandable Envelopes

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Indestructible Small Parcel Envelope Maximiser - Fits 100% of A3 calendars, artwork & picture frames The Lil A5 is our largest 'A range' cardboard envelope, a genuine Royal Mail sm all parcel maximiser built to fit 100% of A3 calendars, artwork and picture frames through the postal system. Equivalent in size to an A3 calendar envelope, it's ideal for artwork packaging, pictures, frames and other visual media that need extra depth and protection. Constructed from E-flute corrugated cardboard with specially designed folds, the A5 provides impact protection around the edges, minimising the risk of damage to valuable products in transit. Our leading peel'n'seal / tear strip system makes sealing and opening effortless. We've extensively researched the range to get the snuggest possible fit for your products, helping the A5 achieve the lowest possible small parcel mailing tariff and keep postage costs down. All products within our envelope range are made from 100% recycled material and are 100% recyclable. The Lil envelopes are the most eco-friendly, plastic free alternative to a standard padded envelope or bubble mailer, and represent a significant step forward in the removal of single use plastics from ecommerce packaging. Padded envelopes stuffed with post-consumer recycled fibre actually use more material than our envelopes and are considerably slower to pack, yet don't provide any additional protection or cost savings. The corner stiffness of the A5 envelope cuts damage in transit, online retailers report nearly 70% fewer returns and 25% faster packing versus bubble mailers. The easy stack design also solves storage space problems for busy fulfilment operations. This range was developed alongside one of the internet's largest retailers, so you might recognise it. Explore the wider corrugated envelope range for other flat pack sizes. Lil Packaging is Europe's largest independent producer of cardboard envelope mailers, trusted by 10,000+ brands. Why Choose Our A5 / A3 Size Cardboard Mailer Our biggest yet: at 448 x 328mm flat, the A5 is our largest cardboard envelope, built for A3 calendars, artwork and picture frames A3 sized fit: equivalent in size to an A3 calendar envelope, fitting 100% of A3 calendars and artworks Small parcel maximiser: engineered for the snuggest possible fit within Royal Mail's small parcel tariff, keeping postage costs down Built to protect: E flute corrugated cardboard with reinforced folds guards valuable artwork and prints against impact damage Genuinely sustainable: FSC certified, Plastic Free and Zero Carbon as standard Proven at scale: developed alongside one of the internet's largest retailers Product Specification Size: 448 x 328mm flat, expands to 358 x 238 x 90mm Material: E flute corrugated cardboard, approx 1.5mm thick Closure: Tamper evident peel and seal (permanent bond) Postal fit: Royal Mail small parcel tariff, small parcel maximiser engineered for the snuggest fit within the 450 x 350 x 160mm limit Certifications: FSC certified, Plastic Free, Zero Carbon Show more