ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50

ARPAN Board Backed envelopes are A4/C4-sized manilla mailers with board backing and a self-seal closure, supplied in a pack of 50. Their printed “Do Not Bend” marking and rigid backing are intended for documents, photographs and artwork, while customer feedback is mixed on durability and adhesive performance.

At a glance

A4/C4 format is listed as 324mm x 229mm.
Board backing and a printed “Please Do Not Bend” message are intended to help keep flat contents protected during mailing.
The self-seal strip is designed for peel-and-press closure without separate tape.
Pack of 50 suits repeated mailing or document storage.

Price

£14.02Save 15%

Reference price: ~~£16.49~~

Price checked: 12 Nov 2026

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Often bought together

ARPAN A4 Manilla Hard Board Backed Envelopes (324 x 229mm) – A4 Do Not Bend Mailers with Self Seal Strip | C4 Rigid Cardboard

Pros and cons

Pros

Rigid board backing is useful for mailing flat items such as certificates, photographs and artwork.
Self-seal closure avoids the need for separate adhesive or tape.
The printed bend warning makes the intended handling of the mailer clear.

Technical specifications

11 specifications

Identity
Brand	ARPAN
Model	Board Backed

Materials and protection
Material listed	Backed Board
Colour	yellow
Printed marking	Printed: Please Do Not Bend

Size and pack
Dimensions	32.4L x 22.9W centimetres
Pack size	Pack of 50
Number of items	50

Closure and use
Closure type	Self-Seal
Adhesive strip width	Self Seal Adhesive Strip 10mm Wide
Recommended uses	Sending Documents, Photos, Artwork

What to know before buying

The listing describes the envelopes as manilla and states that they are made with 120gsm paper, recycled materials and are 100% recyclable, but these claims are not independently verified. Customer feedback is mixed on sturdiness and reports some concerns about adhesive strength, so consider these uncertainties for important or heavier mailings.

Who is it for?

A good fit for

People mailing A4 documents, certificates, photographs or artwork who want board-backed envelopes.
Offices, schools and home users who need a pack for recurring mailings or document organisation.

Less suited to

Buyers who need confirmed strong adhesion for valuable or time-critical contents.
Anyone who needs independently confirmed paper weight, recycled content or recyclability.

ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 4,185 ratings

5 stars83%83%
4 stars12%12%
3 stars4%4%
2 stars0%0%
1 star1%1%

Customer feedback reports positive impressions of quality, value, functionality and size, especially for A4 documents and pictures. Durability and adhesion are mixed, with some finding the envelopes sturdy and others describing them as flimsy or saying the strip has little glue. For flat paper items, the stated board backing and self-seal format fit the intended use, but the mixed reports matter if secure closure or consistent rigidity is essential.

Positive themes

Customers report positive impressions of quality, value, size and functionality, including use with A4 documents and pictures.

Mixed feedback

Feedback on durability ranges from sturdy to flimsy.
Adhesion feedback is mixed, including reports of little glue on the strip.

Frequently asked questions

What size are these envelopes?

The listing gives the size as 324mm x 229mm, described as A4/C4.

How are the envelopes closed?

They have a self-seal adhesive strip. The listing specifies a width of 10mm.

Are they suitable for photographs or certificates?

The listing recommends them for documents, photos and artwork, and describes board backing intended to reduce bending. Customer feedback gives mixed impressions of durability and adhesive strength.

How many envelopes are in the pack?

The selected listing is for a pack of 50.