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C4 Large Letter Box 335 x 245 x 20mm Tufpac® White C4 PiP Box

A white C4 PiP Postal Box in the Maximum Size for Royal Mail Large Letter with a peel & seal closure strip. C4 postal boxes that fit through the large letter slot are great for reducing postage costs as they will always ship as a large letter size through the post.

£ 34.00 £ 34.00
£ 0.49
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C4 PiP Boxes - Maxi C4 Large Letter Box

These 335mm x 245mm x 20mm white C4 PiP boxes are maxi large letter size postal boxes ideal for sending C4 & A4 size items up to 20mm thick such as framed prints, food gifts, cosmetics, & books. The maxi large letter format allows you to ship the maximum size for Royal mail large letter safe in the knowledge that you aren't going to be stung for an oversize package. They feature quick and easy sealing with the handy peel & seal glue strip, helping you to pack your small online order fast. The frustration free tear open strip also allows your customers to easily open the parcel once delivered. They have a premium white finish which looks very smart, and this coupled with the clean and tidy self seal strip gives a professional look to the packed postal boxes.

C4 large letter boxes are also very eco friendly as they are made from corrugated cardboard which is fully recyclable, compostable, and is made from over 70% recycled fibre content. Use our large letter boxes for sending an eco friendly message to you customers and show your commitment to protecting the environment.

C4 PiP Box Features

  • Quickly and easily send small ecommerce orders by post.
  • Reduce postal costs by sending as large letter rather than parcel.
  • High grade corrugated cardboard with premium white finish.
  • Fast and secure sealing with a hot melt peel & seal glue strip.
  • Biodegradable and recyclable.
  • Personalise with your brand logo, see below for details.

Bulk Buy Pricing on C4 PiP Boxes

C4 PiP boxes are available to buy in bulk pallet quantities for those looking for wholesale rates. PiP boxes are manufactured here in the UK so are a very competitive source for large quantities.


Pack of 50Box of 150Pallet of 2400Pallet of 4800Multiple Pallets
68p each63p each45p each33.5p eachCall our team for prices


Frequently Asked Questions about C4 PiP Boxes

The following questions about C4 PiP boxes are regularly asked by our customers, if you have any other questions please get in touch with our postal box team on 02476 611234 or email sales@datecpackaging.com.


What size are Maxi Large Letter PiP Boxes?

Maxi large letter PiP boxes are the maximum size that you can get through the Royal Mail large letter criteria. This size gives you an internal size of 335mm x 245mm x 20mm.


Can C4 PiP Boxes be used as Subscription boxes?

C4 PiP boxes are very popular as small subscription boxes. The large letter C4 format gives you a large volume but still keeps it under the large letter PiP Royal Mail sizing. Keeping the size of these C4 postal boxes under the large letter sizing means you can control the cost of your subscription postal charges without the risk of your shipments going over into package surcharges.

C4 PiP Boxes Specification


Product Code: PIPC008PS


Internal Dimensions: 

Length: 335mm

Width: 245mm

Depth: 20mm


Material: Corrugated Cardboard 125WT SMART Fluting approx. 2.4mm thick


Weight of Box: 110g (0.11 kg)

Finish: White Outside, Brown Recycled Inside


Quantity per Pack: 50

Quantity per Pallet: 4800 (96 packs)


Royal Mail Postal Size: PiP Large Letter

Paper Format Size: A4 (210 x 297 mm)


Easy Open Tear Strip: Yes

Self Seal Strip: Yes


Recycled Material Content: 70% (approx.)

Eco Packaging Score: 4/5

 - Recyclable: Yes

 - Biodegradable: Yes

 - Sustainable Materials: Yes

 - Plastic Free: Yes

 - Carbon Neutral: No

People who purchased this item found it by searching for: C4 PiP Mailers, A4 PiP Boxes, A4 Large Letter Boxes, A4 Postal Boxes, C4 Mailers, White Large Letter Boxes