Polybags logoPolybags logo

0345 200 2828

100% Recycled Mailing Bag
550mm wide x 750mm length, 55 micron thickness. (Large Parcel).
From £50.98 per 200
more bestsellers...
Reinforce your brand on all your packaging
find out more...

Print your design on your carrier bags find out more...

Eco Friendly Shop

News

Get our newsletter for

  • free prize draws
  • extra special offers

Just sign up now...

Mailing Bags with Printed Designs
Mailing Bags with Printed Designs
An exclusive set of designer printed mailers in handy pack sizes.
Our Budget Grip Seal Bags are a cheaper thinner range of the handy resealable bags (with the option of write-on-panels to easy label and catalogue their contents)
Budget Grip Seal Bags
Ideal for sorting
and storing things!
In Grip Seal Bags...

Expandable Cardboard Envelope - A5

MCB01 Expandable Cardboard Envelope - A5
235mm wide x 180mm long (flat) / 195mm wide x 140mm long x 40mm deep (expanded)
A5 size Amazon-style solid paperboard envelope with expandable side gussets for simple conversion into a cardboard box. Also known as a capacity mailer or book mailer. 100% recyclable. Boxed in 50's.
Quantity: Cost? Add
Order Quantity No. in pack Price per pack Price per pack Price per 1000
(Inc. VAT) (Ex. VAT) (Ex. VAT)
50+ 50 £12.78 £10.65 £213.00
250+ 50 £11.63 £9.69 £193.80
500+ 50 £10.82 £9.01 £180.20
1000+ 50 £7.80 £6.50 £130.00
 

A5 expandable cardboard mailer - product features

  • Innovative and flexible packaging solution.
  • Send flat as a rigid envelope, converted into a box, or somewhere between the two.
  • Integral peel & seal strip and rip-strip allows for simple sealing and opening.
  • Solid cardboard (non-corrugated) provides lightweight but strong protection for contents.
  • Perfect for retail businesses of any size.
  • Adjust the length, width and depth to suit your product.
  • As the gussets expand, depth increases but width and/or length decreases.
  • Perfect for sending a variety of small items via post or courier.
  • Also known as a capacity mailer, book mailer or book box.
  • Meets Royal Mail's 'Large letter' or 'Small parcel' sizes - details below.
  • 100% recyclable - dispose of in regular kerbside collections (always check locally).

A5 expandable cardboard mailer - dimensions when flat

  • Width: 235mm (9.5")
  • Length: 180mm (7")

A5 expandable cardboard mailer - dimensions when expanded

  • Width: 195mm (8")
  • Length: 140mm (5.5")
  • Depth (gusset): 40mm (1.5")

Royal Mail Pricing in Proportion sizing - A5 expandable mailer

This mailer meets the following sizes on Royal Mail's Pricing in Proportion (PiP) scale:

  • Size when flat: Large letter
  • Size when expanded: Small parcel

See more sizes in this range

Shopping

FREE DELIVERY

* charge may apply for NI, Highlands and Islands
Polybags Ltd is ranked #1 when compared to all other companies in TrustPilot's category "Packaging". See a live feed of more independent Google & Trustpilot reviews here.

Clear Carrier Bag - Medium
375mm wide x 450mm high x 30 micron thickness, 75mm bottom gusset
From £21.70 per 500
more bestsellers...
100%-Recycled Mailing Bags
Bio and 100%-recycled mailing bags in low quantity handypacks.
Home | Shop | Made to order | Contact Us | About Us | Product Quality | Document Centre | Help

Tel: 0345 200 2828 Company No. 00698834 Vat Reg: GB 226 5049 73 EORI: GB226504973000

Terms & Conditions of Trading | Privacy Policy

Copyright © 1999 - 2025 PB Packaging Group Ltd t/a Polybags, Lyon Way, Greenford, Middlesex, UB6 0AQ

Site by Mangolab powered by SiteFission