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C5 Board Mailing Envelope (Kraft Brown)

SIZE: C5 (Royal Mail Letter)

DIMENSIONS: 163x238mm

THICKNESS: 400g

RECYCLED CONTENT: 100%

ORIGIN: UK

TO FIT: Royal Mail Letter Post

Pack Quantity
£9.15
Excl. VAT
£0.37 / item
SKU: Board-Env-C5x25

Responsible Disposal

Recyclable – Cardboard/Paperboard

How to dispose:

Household recycling bin: Most board envelopes can go in household recycling if clean and tape-free.

Local recycling points: Also accepted at paper and cardboard collection points.

Consider reuse: Ideal for protecting documents, prints, or artwork in future post before recycling.

Care Instructions

Store in a cool, dry place away from moisture and direct sunlight to prevent warping, softening, or fading. Stack neatly to avoid bending corners or damaging the rigid structure. Handle with clean, dry hands to keep surfaces free from marks or dirt, especially if printing or labelling. When ready to use, fold along the pre-scored lines to assemble cleanly without cracking the board.

Made from Recycled Materials Made from Recycled Materials
Self-Seal Closure Self-Seal Closure
Vegan Friendly Vegan Friendly
Made in the UK Made in the UK
Recyclable Recyclable

Our self-sealing board-backed envelopes are 100% recycled, recyclable and plastic free, meaning they are easy to recycle in household recycling.

Manufactured in the UK from 400g eco board and made from 100% post-consumer waste, these envelopes have a convenient peel & seal strip for easy and secure closure. These envelopes do not have the little red strip of plastic commonly found in this style of envelope, making it plastic free and easily recycled.

The rigidity of the board, plus their convenient size (RM large letter), means these envelopes make great protective postal packaging for a wide variety of products, including greetings cards/envelopes, art prints, stationery, and books – Make sure to check out our compostable display bags and recycled grey-board for more packaging ideas!

These board envelopes are unbranded, ready for your branding using stickers, tape, or a stamp. We have a range of printed postal stickers, to convey your eco-friendly ethos to your customer. Use with our recycled L4 labels which are compatible with Click & Drop.

This envelope is C5 size – measuring approx. 162mm x 236mm (fits A5.) and is suitable for items up to 4mm (perfect for Royal Mail Letter). Opening along the long edge, the self-seal strip has a paper (not plastic) release tape.

Available in packs of 25 or bulk boxes of 200.