Royal Mail Large Letter Maximiser - Fits A4 brochures, calendars, DVDs & photos The Lil A3 is a Royal Mail max large letter maximiser, engineered to sit right at the 353 x 250mm large letter limit while packing A4 brochures, calendars, DVDs and photos through the postal system. Its slim construction leaves room for contents up to 23mm thick while still qualifying for Royal Mail's large letter tariff, a limit a standard 6-8mm thick bubble mailer fails to meet, potentially saving around £2 per item mailed versus tipping into the small parcel rate. For the full picture on how this saves money, see our large letter packaging guide. Built from E flute corrugated cardboard with reinforced folds at every edge, the A3 also comfortably works as a CD/DVD mailer alongside brochures, calendars and photo frames, so you can standardise on one size across a mixed A4 product range. Our leading peel'n'seal / tear strip system makes sealing and opening effortless. Read more on safely packaging and mailing CDs and DVDs in our knowledgebase. The corner stiffness of the A3 envelope cuts damage in transit, online retailers report nearly 70% fewer returns and 25% faster packing versus bubble mailers. All Lil envelopes are made from 100% recycled material and are 100% recyclable, a plastic free alternative to the bubble mailer or padded envelope. 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. Your packaging is the first time your customers physically experience your product. Getting it right is your chance to make the best first impression, we help you do just that. Go on... burst that bubble! Lil Packaging is Europe's largest independent producer of large letter mailers and cardboard envelope mailers, trusted by 10,000+ brands. Why Choose Our A3 Large Letter Maximiser Maximises large letter: engineered to sit right at Royal Mail's 353 x 250 x 25mm limit, keeping items under the large letter threshold instead of tipping into small parcel pricing Fits everything A4: brochures, calendars, DVDs, photos and photo frames in one flat pack size Postage smart: large letter compliant flat packed, avoiding the jump to small parcel rates Built to protect: E flute corrugated cardboard with reinforced folds guards against impact and bending at the edges 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: 352 x 249mm flat, expands to 312 x 209 x 40mm Material: E flute corrugated cardboard, approx 1.5mm thick Closure: Tamper evident peel and seal (permanent bond) Postal fit: Royal Mail large letter tariff, flat packed within the 353 x 250 x 25mm limit (Large Letter tariff) Certifications: FSC certified, Plastic Free, Zero Carbon
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