Royal Mail Maximisers

A3 Envelope

352 x 249 x mm
In stock - 14015 LEFT

Look no further for a large letter envelope, the Lil A3 envelope ensures the cheapest postal tariff every time. Maximising the large letter size limit and reducing your postal costs, these large letter mailers are perfect for calendars and artwork. These envelopes are better than bubble mailers - the corner stiffness of the A3 envelope cuts damage in transit.  Online retailers report nearly 70% fewer returns and 25% faster packing. Perfect if you need sturdy large letter mailers for your e-commerce business.  

From £0.53

Looking for a large letter envelope to maximise the Royal Mail large letter size limit of 353 x 250 x 25mm? The Lil A3 is a large letter mailer featured in our cardboard envelope range. This mailer is perfect for delivering A4 brochures, calendars, DVD's, photos, photo frames and more through the postal system.  With its attractive 'kraft' finish customers will open this effective packaging to receive their products in the condition that they want them.  The A3 large letter envelopes are made from very stiff 450gsm material, with specially designed folds to provide impact protection around the edges, to help minimise the risk of impact damage. The envelope features our leading peel'n'seal / red tear-strip system for easy sealing and opening. 

All products within our envelope range are made from 100% recycled and are 100% recyclable. The Lil envelopes are the most eco-friendly plastic free alternative to a standard padded envelope or bubble mailer and they represent a significant step forward in the removal of single use plastics from ecommerce packaging. Eco friendly padded envelopes that are stuffed with post consumer recycled fibre actually use MORE material than our envelopes and are considerably slower to pack, yet do not provide any additional protection or cost savings. This is why our envelopes are trusted to deliver products and media across the globe by the internet's biggest online retailer.

AusPost and Royal Mail Large Letter envelope maximiser for cheap postal tariff mailings. Our sizes are extensively researched to get the snuggest fit - and lowest cost mailing tariff.

This range was co-developed with one of the Internet's largest retailers... so you might recognise our envelopes!

This Lil envelope is incredibly stiff yet with a total product thickness of only 1.71mm, this means that you can send items up to 23mm thick through the ‘large letter’ price tariff. A standard 6mm – 8mm thick bubble mailer would fail. The result being a potential £2 saved per item mailed. Tired of returns and unhappy customers? These envelopes are better than bubble mailers - the corner stiffness of the A3 envelope cuts damage in transit.  Online retailers report nearly 70% fewer returns and 25% faster packing. Struggling with storage space for your packaging? The easy stack design of the A3 envelope is the answer.


Your packaging is the first time that your customer will physically experience your product. Getting it right is your chance to make the best first impression. We help you do just that with our award winning range of Lil envelopes. This brilliant, tough envelope is one of our best selling items for a reason. If you're looking for sturdy and cost effective packaging for mailing A4 brochures, calendars, DVD's, photo frames and more think of nothing else (rather than cheap envelopes that fall apart, leave your items damaged and your customers dissatisfied!). Go on...burst the bubble!

Color Brown Corrugated
Flap Type Hotmelt Peel & Seal with red rip strip opening
Height 0
Glue Seams External seams
Internal Width MM 352
Width (mm) 301 - 400
Internal Length MM 249
Length (mm) 201 - 300
Internal Width Inches 13.6
Internal Length Inches 9.7
Item Thickness 450gsm / 640mic
Item Weight (g) 86
Pallet Size 100x120x165cm / 40x48x65"
Quantity per Box/Pack 150
Quantity per pallet 7200
Width 352
  • 100% recyclable

  • easy open tear strip

  • fits large letter

  • peel 'n' seal

  • supplied form strapped