---
product_id: 557632962
title: "Postmaster C4 Envelopes Peel & Seal for A4 Sheets 100GSM White Paper - 25 Pack"
brand: "postmaster"
price: "A$18"
currency: AUD
in_stock: true
reviews_count: 8
category: "Postmaster"
url: https://www.desertcart.com.au/products/557632962-postmaster-c4-envelopes-peel-and-seal-for-a4-sheets-100gsm
store_origin: AU
region: Australia
---

# PEFC-certified sustainable paper Perfect A4 fit Opaque privacy lining Postmaster C4 Envelopes Peel & Seal for A4 Sheets 100GSM White Paper - 25 Pack

**Brand:** postmaster
**Price:** A$18
**Availability:** ✅ In Stock

## Summary

> 📬 Seal your professionalism with every send!

## Quick Answers

- **What is this?** Postmaster C4 Envelopes Peel & Seal for A4 Sheets 100GSM White Paper - 25 Pack by postmaster
- **How much does it cost?** A$18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/557632962-postmaster-c4-envelopes-peel-and-seal-for-a4-sheets-100gsm)

## 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

- • **Trusted UK Quality:** Manufactured in the UK with premium 100GSM bright white paper, compatible with printers and labels.
- • **Privacy-First Design:** Opaque blue interior lining keeps your sensitive documents confidential and secure.
- • **Designed for A4 Sheets:** Fits unfolded A4 documents perfectly, ideal for professional mailings without extra postage.
- • **Eco-Friendly & Certified:** Made from PEFC-certified paper supporting sustainable forest management—mail with a conscience.
- • **Effortless Peel & Seal Closure:** No licking, no mess—just peel and press for a secure seal every time.

## Overview

Postmaster C4 Envelopes are premium, peel & seal envelopes designed to fit unfolded A4 sheets securely. Featuring an opaque blue privacy lining and made from PEFC-certified sustainable 100GSM paper, these UK-manufactured envelopes combine eco-consciousness with professional-grade quality. Ideal for business or formal use, they ensure hassle-free sealing and compatibility with most printers, making them a must-have for any modern office.

## Description

C4 ENVELOPE - Designed to take sheets of A4 Paper unfolded. Designed to be sent using a single Large Letter 1st Class or 2nd Class Stamp (max 100g)KEEPS YOUR DOCUMENTS PRIVATE - our envelopes are printed on the inside with an opaque blue pattern that makes it difficult to see what is inside the envelopePEFC-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 managementHYGIENIC & FAST - this envelope features Peel & Seal closing, which means no licking or peeling. Simply Peel the Tape then press the flap down for a secure, hassle free closeMADE IN THE UK - we manufacture millions of Envelopes for some of Britain's biggest Organisations as well as for thousands of small, home based businesses using quality, bright white 100GSM paper. The Paper can be written on, labelled or can be used with most household & office printers

Review: Great all round product envelope - Perfect to have on standby for those larger items you might need to post or save such as copies of certificates. The seal is extremely strong and does not require additional tape when sending. These are packaged in thin film so once opened there is no easy way to keep them together but apart from that this this is a perfect product. Ideal thickness so that additional postage will not be added. Sufficiently durable to store documents longer-term. Perfect fit for A4 sheets and could probably take up to about 10 sheets per envelope.
Review: Value for money - A smart idea. Just open, place paper inside and seal. Good quality.

## Features

- C4 ENVELOPE - Designed to take sheets of A4 Paper unfolded. Designed to be sent using a single Large Letter 1st Class or 2nd Class Stamp (max 100g)
- KEEPS YOUR DOCUMENTS PRIVATE - our envelopes are printed on the inside with an opaque blue pattern that makes it difficult to see what is inside the envelope
- 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
- HYGIENIC & FAST - this envelope features Peel & Seal closing, which means no licking or peeling. Simply Peel the Tape then press the flap down for a secure, hassle free close
- MADE IN THE UK - we manufacture millions of Envelopes for some of Britain's biggest Organisations as well as for thousands of small, home based businesses using quality, bright white 100GSM paper. The Paper can be written on, labelled or can be used with most household & office printers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CGB1PLM2 |
| Best Sellers Rank | 190 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 1 in Booklet Mailing Envelopes |
| Brand | Postmaster |
| Brand Name | Postmaster |
| Closure Type | Self-Seal |
| Closure type | Self-Seal |
| Colour | White |
| Customer Reviews | 4.6 out of 5 stars 1,268 Reviews |
| Item Dimensions L x W | 33.4L x 22.9W centimetres |
| Item Shape | Rectangular |
| Item Type Name | Envelopes |
| Manufacturer | Bong |
| Material | Paper |
| Material Type | Paper |
| Model Name | Envelopes |
| Number of Items | 25 |
| Number of items | 25 |
| Occasion | Office |
| Occasion Type | Anytime, Business, Formal |
| Recommended Uses For Product | Documents, Letter, Seed |
| Size | A4 |
| Special Features | Peel & Seal, Self-Adhesive Closure |
| Style | A4 |
| Unit Count | 25.0 count |

## Product Details

- **Brand:** Postmaster
- **Closure type:** Self-Seal
- **Colour:** White
- **Material:** Paper
- **Occasion:** Office

## Images

![Postmaster C4 Envelopes Peel & Seal for A4 Sheets 100GSM White Paper - 25 Pack - Image 1](https://m.media-amazon.com/images/I/61gPY6Zv9GL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great all round product envelope
*by P***N on 8 January 2026*

Perfect to have on standby for those larger items you might need to post or save such as copies of certificates. The seal is extremely strong and does not require additional tape when sending. These are packaged in thin film so once opened there is no easy way to keep them together but apart from that this this is a perfect product. Ideal thickness so that additional postage will not be added. Sufficiently durable to store documents longer-term. Perfect fit for A4 sheets and could probably take up to about 10 sheets per envelope.

### ⭐⭐⭐⭐⭐ Value for money
*by M***S on 1 February 2026*

A smart idea. Just open, place paper inside and seal. Good quality.

### ⭐⭐⭐⭐ Functional and Cheap Envelopes
*by D***E on 1 December 2025*

These enveloped are fine for when I wanted to return some formal A4 letters. You have to fold the A4 in half but this is standard for business letters. The envelope is functional and seals well. The paer used is a little on the thin side and not premium grade but functionally these envelopes do the job.

## Frequently Bought Together

- Postmaster A4 Envelopes Peel & Seal 100GSM White Paper - 25 Pack
- Postmaster A5 Envelopes Peel & Seal 100GSM White Paper - 25 Pack
- Postmaster Envelopes DL Peel & Seal 100GSM White Paper - 100 Pack

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**Shop now:** [https://www.desertcart.com.au/products/557632962-postmaster-c4-envelopes-peel-and-seal-for-a4-sheets-100gsm](https://www.desertcart.com.au/products/557632962-postmaster-c4-envelopes-peel-and-seal-for-a4-sheets-100gsm)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-11*