---
product_id: 454042088
title: "Postmaster A5 C5 Do Not Bend Board Back Envelopes 229 x 162 mm Peel Seal 50 Pack, Brown"
brand: "postmaster"
price: "211 Lei"
currency: RON
in_stock: true
reviews_count: 10
category: "Postmaster"
url: https://www.desertcart.ro/products/454042088-postmaster-a5-c5-do-not-bend-board-back-envelopes-229
store_origin: RO
region: Romania
---

# Precise A5/C5 sizing PEFC-certified sustainable material Rigid board-backed protection Postmaster A5 C5 Do Not Bend Board Back Envelopes 229 x 162 mm Peel Seal 50 Pack, Brown

**Brand:** postmaster
**Price:** 211 Lei
**Availability:** ✅ In Stock

## Summary

> 📬 Send it safe, send it smart — your documents deserve the best!

## Quick Answers

- **What is this?** Postmaster A5 C5 Do Not Bend Board Back Envelopes 229 x 162 mm Peel Seal 50 Pack, Brown by postmaster
- **How much does it cost?** 211 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/454042088-postmaster-a5-c5-do-not-bend-board-back-envelopes-229)

## Best For

- postmaster enthusiasts

## Why This Product

- Trusted postmaster brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Eco-Conscious Choice:** PEFC-certified materials support sustainable forestry—mail smarter, greener.
- • **Unmatched Document Defense:** Hard board backing ensures your important papers arrive pristine and crease-free.
- • **Seal & Send with Confidence:** Strong self-seal adhesive strip locks in contents securely, saving you time and worry.
- • **Trusted by Britain’s Best:** Manufactured by Postmaster, the go-to for millions of envelopes trusted by top UK organizations.
- • **Perfect Fit for Professional Mail:** Sized for A5 or folded A4 sheets, optimized for single 1st/2nd class postage—no extra hassle.

## Overview

This 50-pack of Postmaster A5 board-backed envelopes offers robust protection for important documents with a rigid backing that prevents bending. Sized perfectly for A5 or folded A4 sheets, these envelopes feature a secure self-seal closure and are PEFC-certified for sustainability. Trusted by major UK organizations and rated 4.6 stars by nearly 900 users, they combine professional reliability with eco-conscious design.

## Description

Postmaster A5 C5 Do Not Bend Board Back Envelopes 229 x 162 mm Peel Seal 50 Pack, Brown : desertcart.co.uk: Stationery & Office Supplies

Review: Does exactly what it says, strong and reliable - These board back envelopes are exactly what you want if you need to post documents safely. They are sturdy, keep contents flat, and do a good job of preventing bends during transit. The board backing is strong enough to protect papers without being overly thick or bulky. They are easy to seal, the sizing is accurate, and they feel well made overall. I have used them for posting important documents and they have arrived in good condition. If you need reliable envelopes that do what they are meant to do, these are a solid choice. Great value and no complaints.
Review: Send items with ease of mind - I’ve been using C5 cardboard envelopes for a few months now, and they’ve quickly become my go-to choice for mailing documents, photos, and small prints. The quality is outstanding — the cardboard is sturdy and gives a reassuring level of protection during transit. I’ve never had issues with bending or creasing, even when sending more delicate items. The size is just right for A5 documents or folded A4 sheets, making them super versatile for both personal and professional use. The self-seal adhesive strip is strong and secure, saving me time and hassle. Overall, these envelopes are reliable, professional-looking, and worth every penny. Highly recommended for anyone who wants peace of mind when sending important items

## Features

- HARD BOARD-BACKED PROTECTION - Essential for Important Documents such as legal papers, photographs, certificates, passports
- C5 ENVELOPE - Designed to take sheets of A4 Paper folded in half, or sheets of A5 paper unfolded. Designed to be sent using a single 1st Class or 2nd Class Stamp (max 100g)
- DO NOT BEND - written clearly on the Envelope to help ensure your mail gets couriered through the postal system without being folded or damaged
- PEFC-CERTIFIED FOR SUSTAINABILITY - PEFC is a European based Forest certification system, that allows small- and family forest owners to demonstrate their excellence in sustainable forest management
- POSTMASTER - we manufacture millions of Envelopes for some of Britain's biggest Organisations as well as for thousands of small, home based businesses

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B2PX3XDQ |
| Best Sellers Rank | 282 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 11 in Envelopes |
| Brand | Postmaster |
| Closure | Self-Seal |
| Colour | Hardback A5 |
| Customer Reviews | 4.6 4.6 out of 5 stars (893) |
| Date First Available | 30 May 2022 |
| Item Weight | 1.39 kg |
| Manufacturer | Bong |
| Manufacturer Part Number | RBL10613 |
| Material Type | Cardstock |
| Model Number | RBL10613 |
| Number of Items | 50 |
| Paper Finish | Matte |
| Paper Weight | 120 |
| Product Dimensions | 16.2 x 22.9 x 0.05 cm; 1.39 kg |
| Shape | Rectangular |
| Sheet Size | 229 x 162 |
| Size | Board Backed |

## Product Details

- **Brand:** Postmaster
- **Closure type:** Self-Seal
- **Colour:** Hardback A5
- **Material:** Cardstock
- **Occasion:** Formal

## Images

![Postmaster A5 C5 Do Not Bend Board Back Envelopes 229 x 162 mm Peel Seal 50 Pack, Brown - Image 1](https://m.media-amazon.com/images/I/61M6Cv2Ts3L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does exactly what it says, strong and reliable
*by D***B on 26 December 2025*

These board back envelopes are exactly what you want if you need to post documents safely. They are sturdy, keep contents flat, and do a good job of preventing bends during transit. The board backing is strong enough to protect papers without being overly thick or bulky. They are easy to seal, the sizing is accurate, and they feel well made overall. I have used them for posting important documents and they have arrived in good condition. If you need reliable envelopes that do what they are meant to do, these are a solid choice. Great value and no complaints.

### ⭐⭐⭐⭐⭐ Send items with ease of mind
*by C***E on 20 May 2025*

I’ve been using C5 cardboard envelopes for a few months now, and they’ve quickly become my go-to choice for mailing documents, photos, and small prints. The quality is outstanding — the cardboard is sturdy and gives a reassuring level of protection during transit. I’ve never had issues with bending or creasing, even when sending more delicate items. The size is just right for A5 documents or folded A4 sheets, making them super versatile for both personal and professional use. The self-seal adhesive strip is strong and secure, saving me time and hassle. Overall, these envelopes are reliable, professional-looking, and worth every penny. Highly recommended for anyone who wants peace of mind when sending important items

### ⭐⭐⭐⭐⭐ Good Quality and Value
*by E***3 on 9 January 2026*

Perfect size for "small letter" sized postage items (as long as the contents are light enough for the package to remain in that category). Sturdy, would recommend.

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-26*