# 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.

- [Original product page](https://bargainpostbox.co.uk/product/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [View offer](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: ARPAN
- Model: Board Backed
- Category: Office & Stationery > Packaging & Shipping Supplies
- Price: 14.02 GBP
- Previous price: 16.49 GBP
- Discount: 15%
- Price checked: 2026-11-12T19:19:39.715Z
- Rating: 4.7 / 5
- Reviews: 4185

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## 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.

## 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.

## 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

## Before you buy

- 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.

## 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.

## Customer feedback

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.
- Mixed feedback: 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.

## Alternative options

- [125Pcs A4 Hard Board Backed Envelopes Do Not Bend, STRBOXONG C4 Hardback Envelopes Peel & Seal for Secure Postage and Art, Brown Manilla Cardboard Mailing Envelopes, 324x229mm, Royal Mail Large Letter](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [Double Dragon 100-Pack A4 C4 Manilla Hard Board Backed Envelopes \| 324mm x 229mm \| 'Please Do Not Bend' Printed \| Padded & Tamper-Proof \| Self-Seal Closure](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [UKPAPER 20 A4 Envelopes Self-Seal 324mm x 229mm A4 C4 Manilla Hard Board Backed Envelopes Do Not Bend Envelope x20](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [Crimson Starfish Cardboard Envelopes - 100 A4 Peel & Seal Letter Envelopes - 249mm x 352mm - 400gsm Card - Rip & Strip Open - Mailers for Royal Mail Large Letter Posting \(PIP\)](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [ARPAN A5 Manilla Hard Board Backed Envelopes \(229 x 162mm\) – A5 Do Not Bend Mailers with Self Seal Strip \| C5 Rigid Cardboard Backed Postal Envelopes for Photos, Cards, Print, Documents \(Pack of 250\)](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [STRBOXONG A4 Hardback Envelopes Do Not Bend, C4 Hard Board Backed Envelopes Peel and Seal for Art Prints & Certificates, Brown Manilla Cardboard Mailers, 324 x 229mm, Royal Mail Large Letter\(10 Pcs\)](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [Crimson Starfish Cardboard Envelopes \| 100 A4/C4 Peel & Seal Letter Envelopes \| 234 x 334 mm 400gsm Envelopes \| Rip & Strip Open \| Card Mailers for Royal Mail Large Letter Posting \(PIP\)](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [Triplast 20 x A3 C3 Manilla Hard Board Back Envelopes \(457x324mm\) - Cardboard Backed Mailers with Peel & Seal Strip - Rigid Do Not Bend Envelopes for Mailing Posting Shipping & Storing Documents](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [ARPAN A3 Manilla Hard Board Back Envelopes \(457x324mm\) – A3 C3 Do Not Bend Mailers with Self Seal Strip \| Rigid Cardboard Backed Postal Envelopes for Artwork, Photos & Documents \(Pack of 200\)](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)
- [Arpan 162 x 114 mm A6 C6 Manilla Hard Board Backed Envelopes Do Not Bend \(Pack of 2000\)](https://bargainpostbox.co.uk/visit/arpan-board-backed-a4-manilla-envelopes-50-pack)

## Add-ons

- [ARPAN A4 Manilla Hard Board Backed Envelopes \(324 x 229mm\) – A4 Do Not Bend Mailers with Self Seal Strip \| C4 Rigid Cardboard](https://bargainpostbox.co.uk/visit/arpan-a5-board-backed-envelopes-50-pack)

## Images

![ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 — 1](https://bargainpostbox.co.uk/i/ADdTBQ0y5wtGAUMtspsA_s3Ma3VKnCDt8nYm-rPeoR9XPnvhmBiqQOct5PFFGY7oNykBgLb5VAsGKrjRRC474Lm1YxIsjehVNIcoKh6Zc5z7sSQyBkb42bVK.jpg)

![ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 — 2](https://bargainpostbox.co.uk/i/JKMa343G1ry6XtjnKaCaWsOD_xC0qQUDzuWACr7srqzGZp07P11R2li3fnAIS8TLZsqrDyi-8FiKWYbnMdoA2t6LT-OUjsabXgnTAaaopHobsBelOFgsGJdY.jpg)

![ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 — 3](https://bargainpostbox.co.uk/i/Ul4LP3NGsjh9P0kpuebpXSE2USzA5r7XXxNYMcpsCsYUckVzq4uIWbXL0eNVM2RRcfdFUS4NhqXoroRuJvuoYdj6ISuAYg9Fh9X1OaxKYBt2wTkpSi8qyjml.jpg)

![ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 — 4](https://bargainpostbox.co.uk/i/tYMjszgHdfoGSNcU-shU-UrT_4BuMMXAuNM3_6C_KniqKQ25pbN4-CMgRUhN29OYGrkQe04KrSK0evEU7eMCefnaAQertvY3PnKiGXI-9DH4lPsJo8c0Br8H.jpg)

![ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 — 5](https://bargainpostbox.co.uk/i/kma-dI8AmMa0Sw233fgvV1948PHnirMxwjCUcmR-hXdAYRJRd_3ZhD_1UzXwlDGCmoXRWELiwOO_Q29yIHA0AapzWhSQ9wjujINrHW6ee0pO9P7rKlSN9KfW.jpg)

![ARPAN Board Backed A4 Manilla Envelopes, 324 × 229 mm, Pack of 50 — 6](https://bargainpostbox.co.uk/i/rlMvmJHiK4YfIy0kTQ65ruag90Y47x7nVgiDRcFbiP-aNym4bGZuUCoDEIOV2pkvxITEHwtuLw2yd6osFZO5KY3edrrAVb8gKgsdghSZ8wR9Nmy-FJKhQ6dX.jpg)