# ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125

Pack: ARPAN A4 board-backed envelopes are C4-sized mailers for sending A4 documents, photos and certificates. A fibreboard backing, peel-and-seal closure and printed “Do Not Bend” message suit flat items that need added resistance to bending, though customer feedback is mixed on both stiffness and adhesive performance.

- [Original product page](https://bargainpostbox.co.uk/product/arpan-a4-c4-board-backed-envelopes-125)
- [View offer](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: ARPAN
- Category: Office & Stationery > Packaging & Shipping Supplies
- Price: 27.20 GBP
- Previous price: 32.00 GBP
- Discount: 15%
- Price checked: 2026-11-12T14:59:11.705Z
- 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 measures 324 x 229 mm, with a fibreboard backing intended to help keep flat contents from bending.
- Peel-and-seal closure avoids requiring separate tape or moisture.
- The listing says the front is printed with “Please Do Not Bend”.
- Pack of 125 is aimed at regular document and photo mailing.

## Pros

- A4/C4 dimensions accommodate flat A4 documents and photos, according to the listing.
- Self-seal strip makes it straightforward to close envelopes without separate tape.
- The printed Do Not Bend message communicates handling guidance to postal handlers.

## Specifications

### Identity
- Brand: ARPAN
### Materials and protection
- Material listed: Fibreboard
- Envelope material claim: high-quality 120gsm manilla
- Printed message: Please Do Not Bend
### Size and quantity
- Dimensions: 32.4L x 22.9W centimetres
- Listed size: Pack of 125
- Number of items: 125
- Shape: Rectangular
### Closure and appearance
- Closure type: Self-Seal
- Adhesive strip width: 10mm wide
- Colour: yellow
- Style: Single
### Use
- Occasion: everyday mailing
- Recommended uses: Mailing Letters, Sending Important Documents
- Special features: Lightweight, Self Seal

## Before you buy

- The listing describes the mailers as lightweight yet also claims sturdy or hardboard construction. Customer feedback reports mixed durability and adhesion, including reports of flimsy envelopes and little glue on the strip, so these may not suit contents requiring reliably rigid protection or a consistently strong seal. The listing gives a size in millimetres and centimetres, both corresponding to 324 x 229 mm, and describes the product as both manilla and fibreboard without clarifying the material layers. Recyclability and recycled-material claims are stated but not independently established. Check the selected listing if exact construction or adhesive performance is critical.

## A good fit for

- Offices, schools and frequent mailers sending A4 documents, certificates or photographs in quantity.
- People who want a self-seal envelope with a visible Do Not Bend message for flat contents.

## Less suited to

- Sending items that need padding, waterproofing or a guaranteed rigid protective mailer.
- Buyers who require consistently strong adhesive or a verified level of board stiffness.

## Customer feedback

Customer feedback is positive about quality, value, size and functionality, with the dimensions and format fitting the stated use for A4 documents and pictures. Durability and adhesion receive mixed reports, including concerns about flimsy construction and limited glue. For buyers mailing flat paperwork, the backing and self-seal strip are relevant features, but the reported variation means they should not be treated as a guarantee of rigidity or a dependable seal.
- Positive themes: Feedback highlights perceived quality, value, size and functionality.
- Mixed feedback: Durability feedback ranges from sturdy to flimsy.
- Mixed feedback: Adhesion feedback is mixed, with reports of little glue on the strip.

## Frequently asked questions

### What size are these envelopes?
The listing identifies them as A4/C4 and gives dimensions of 324 x 229 mm, also shown as 32.4 by 22.9 centimetres.
### How many envelopes are included?
The selected listing describes a pack of 125.
### Do they have a self-seal closure?
Yes. The listing specifies a self-seal strip and gives its width as 10mm wide.
### Are they suitable for items that must not bend?
They have a fibreboard backing and a printed Do Not Bend message, but feedback is mixed on durability. Consider a more protective option if bending would cause serious damage.

## 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-a4-c4-board-backed-envelopes-125)
- [Right Pack Envelopes A4 125PCS \| Padded Envelopes 324mm x 229mm \| A4 C4 Manilla Hard Board Backed Envelope \| Do Not Bend & Self Seal Envelope Pack](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)
- [125PCS 229mm x 162mm A5 C5 Manilla Hard Board Backed Envelopes Please Do Not Bend Right Pack \(Box Pack of 125\)](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)
- [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-a4-c4-board-backed-envelopes-125)
- [YOUNTHYE 60 Pack Expandable Gusset Envelope, 13.7x8.2inch Large Envelopes Peel and Seal, Kraft 80gsm Manilla Envelope, 350x210x110mm for Photos, Documents, Magazines](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)
- [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 \(Pack of 400\)](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)
- [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-a4-c4-board-backed-envelopes-125)
- [Arpan 162 x 114 mm A6 C6 Manilla Hard Board Backed Envelopes Do Not Bend \(Pack of 2000\)](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)

## Add-ons

- [ARPAN A3 Manilla Hard Board Back Envelopes \(457x324mm\) – A3 C3 Do Not Bend Mailers with Self Seal Strip \| Rigid Cardboard Bac](https://bargainpostbox.co.uk/visit/arpan-a4-c4-board-backed-envelopes-125)
- [ARPAN A5 Manilla Hard Board Backed Envelopes \(229 x 162mm\) – A5 Do Not Bend Mailers with Self Seal Strip \| C5 Rigid Cardboard](https://bargainpostbox.co.uk/visit/arpan-a5-board-backed-envelopes-125)

## Images

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 1](https://bargainpostbox.co.uk/i/ADdTBQ0y5wtGAUMtspsA_s3Ma3VKnCDt8nYm-rPeoR9XPnvhmBiqQOct5PFFGY7oNykBgLb5VAsGKrjRRC474Lm1YxIsjehVNIcoKh6Zc5z7sSQyBkb42bVK.jpg)

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 2](https://bargainpostbox.co.uk/i/Ul4LP3NGsjh9P0kpuebpXSE2USzA5r7XXxNYMcpsCsYUckVzq4uIWbXL0eNVM2RRcfdFUS4NhqXoroRuJvuoYdj6ISuAYg9Fh9X1OaxKYBt2wTkpSi8qyjml.jpg)

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 3](https://bargainpostbox.co.uk/i/tYMjszgHdfoGSNcU-shU-UrT_4BuMMXAuNM3_6C_KniqKQ25pbN4-CMgRUhN29OYGrkQe04KrSK0evEU7eMCefnaAQertvY3PnKiGXI-9DH4lPsJo8c0Br8H.jpg)

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 4](https://bargainpostbox.co.uk/i/rlMvmJHiK4YfIy0kTQ65ruag90Y47x7nVgiDRcFbiP-aNym4bGZuUCoDEIOV2pkvxITEHwtuLw2yd6osFZO5KY3edrrAVb8gKgsdghSZ8wR9Nmy-FJKhQ6dX.jpg)

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 5](https://bargainpostbox.co.uk/i/JKMa343G1ry6XtjnKaCaWsOD_xC0qQUDzuWACr7srqzGZp07P11R2li3fnAIS8TLZsqrDyi-8FiKWYbnMdoA2t6LT-OUjsabXgnTAaaopHobsBelOFgsGJdY.jpg)

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 6](https://bargainpostbox.co.uk/i/pVo-O1DUK86eRv80wQcXy-zvKBPFoAT9SU7swxZzwmtd1LOQLQsdjbA7kE85ehTLOP052OUPsescZwch_gs7Oof5WahakM88f6qNp5x2e6sjB7JQwFyg7DbY.jpg)

![ARPAN A4 C4 Board-Backed Envelopes, 324 x 229 mm, Pack of 125 — 7](https://bargainpostbox.co.uk/i/kma-dI8AmMa0Sw233fgvV1948PHnirMxwjCUcmR-hXdAYRJRd_3ZhD_1UzXwlDGCmoXRWELiwOO_Q29yIHA0AapzWhSQ9wjujINrHW6ee0pO9P7rKlSN9KfW.jpg)