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Pack of 10 X Greener Route A4+ Cardboard Envelopes – Corrugated Capacity Book Mailers

248 x 345mm Flat (209 x312mm x40mm folded) – Heavy Duty 400gsm – Peel and Seal, Rip and Strip Open – for Royal Mail Large Letter

Our A4+ High Quality Capacity Book Mailers Flute Envelopes / Cardboard Envelopes 248 x 345 mm are made from  recycled 400gsm Card. They feature Peel and Seal. Rip and Strip Open.  Our rigid Card Mailers are ideal for Royal Mail Large Letter Posting (PIP).

Book Wraps and Cardboard Mailers are the perfect choice for a fast, hassle-free packaging experience. It provides robust protection for a huge range of products, and specifically, as the name suggests, for mailing books. Simply wrap your product in the flexible corrugated cardboard for all-round cushioned protection. Furthermore, you can Adjust the mailer to the depth of your item to provide a precise fit for enhanced security and prevent movement in transit.

Their slim, compact appearance makes rigid wallet mailers a highly presentable packing agent for businesses widespread. So if you would like to ensure high-quality protection for your books or other similar sized products, this an great eco-friendly solution.

A4+  Corrugated Capacity Book Mailers Flute Envelopes – Cardboard Envelopes Features

Our cost-effective A4+ cardboard envelopes are the answer when you want to mail flat items – like books – in a strong protective board backed envelope but need extra depth. Sometimes known as “capacity book mailers”, they can adapt to the thickness of the contents by up to 50mm – perfect for also posting DVDs, artwork, computer games and brochures.

Simply pop the item/s inside and close with the secure peel-and-seal strip. You can label or write directly on the smooth Manilla Kraft finish and there is an easy tear-off opener. A4+ cardboard envelopes are Royal Mail large letter size (up to 25mm thick and 750g). 

All of our mailers have gussets to allow them to act as a small postal box when goods are inserted. Each size complies with Royal Mail PiP guidelines. You can therefore send your items with a clear idea of postage costs. Other features include a tear strip for easy opening and peel strip for secure closure.

  • Envelope-like heavy duty wallets manufactured from 100% recycled and recyclable material
  • Two strengths of capacity book mailer available:
  • Standard solid board – light to medium duty
  • Equipped with peel-&-seal closure strip and easy open tear strip
  • Scored for increased capacity – up to 40mm

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Weight0.9 kg
Dimensions36 × 24 × 10 cm


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Size Flap Max50mm
Item Weight115.65g
FinishMicro Flute
SealPeel and Seal
MaterialCorrugated Board
Material Weight400Gsm
Weight FormatGsm
SeamsOutside Seams
GTIN-13 / EAN5055405655138
Parent ColourManilla
Commodity Code48172000
Country of originCN
Box Quantity100
Box Weight9.06 kg
Size (mm)278 x 400 mm
Size (cm)27.8 x 40 cm
Size (inches)10.94 x 15.75 inches


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[Pack of 10] Greener Route A4+ Cardboard Envelopes – Corrugated Capacity Book Mailers 248x345mm Flat

Pack of 10 x A4+ Cardboard Envelopes/ Corrugated Capacity Book Mailers/ 248 mm x 345 mm – 400gsm – Peel and Seal – Rip and Strip Open – Heavy Duty Rigid Cardboard Wallet Mailers for Royal Mail Large Letter Posting (PIP) – by Greener Route.

     Biodegradable Icon - Greener ROute Sustainably sourced - Greener Route Recycled Materials Icon - Greener Route PLastic Free Icon - Greener Route Compostable Icon - Greener Route



Availability: 52 in stock

Volume Discount

Quantity Discount (%) Price
1 - 3 £15.95
4+ 18.81 % £12.95

    Product total

    Options total

    Grand total

    RRP: £15.95 (exc. VAT)

    Weight0.9 kg
    Dimensions36 × 24 × 10 cm

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