Secure Postal Boxes

• Easy and fast postal packaging solution
• Secure closure design prevents unauthorized opening, tampering or theft
• All-in-one packaging
• Easy opening

From: £0.45 Regular Price £0.45
In stock
Only %1 left
145 x 130 x 65 mm - Brown/white - CSP001
145 x 130 x 65 mm - Brown/brown - CSP002
235 x 140 x 129 mm - Brown/white - CSP009
252 x 136 x 88 mm - Brown/white - CSP005
320 x 200 x 130 mm - Brown/white - CSP007
392 x 242 x 159 mm - Brown/white - CSP011
* Request your bespoke size or request a quote for a larger quantity
Amount: 1 units
Free delivery over £100 *
Price per unit:
per unit
total: ex. VAT total: inc. VAT
  • Cut-off time 2:30 pm
  • Free delivery over £150 *
  • 30 Days Returns

* Please refer to our delivery policy page. For any queries please contact us.

Secure Postal Boxes Product Details

SKU Dimensions
(Length x Width x Height)
Pallet Quantity Bundle
CSP001 145x130x65mm 2800 50
CSP002 145x130x65mm 3200 50
CSP003 229x229x90mm 700 50
CSP005 252x136x88mm 2600 50
CSP007 320x200x130mm 800 50
CSP009 235x140x126mm 1800 50
CSP010 282x192x192mm 450 50
CSP011 392x242x159mm 450 50
CSP012 392x242x280mm 450 50

Be sure that your product will be delivered to your customer in perfect condition thanks to our range of e-commerce boxes. Designed for online retailing, our postal boxes include a unique closing system that effectively prevents theft! Easy to assemble and made with high-quality corrugated paper, our e-commerce postal boxes come in all sizes to meet your businesses specific needs.

Recommended for

  • Jewellery and luxury products

  • Any e-commerce with a robust customer experience strategy


  • CSP001, CSP002, CSP003, CSP005 and CSP007: Box thickness of 1.5 mm with brown/white cardboard recycled paper quality of 120gsm

  • CSP009, CSP010, CSP011 and CSP012: Box thickness of 3 mm with brown/white cardboard recycled paper quality of 160gsm

  • Sizes 252 x 136 x 88 mm and 320 x 200 x 130 mm (also include easy-opening strip

  • With adhesive strip for closure

  • Environmentally friendly, 100% recyclable

  • Those products are not designed to be used for heavy duty products unless stated otherwise, not to be used under high humidity or high temperatures conditions

  • All dimensions may vary by up to 3mm

Key Features

Easy and fast postal packaging solution

Our secure postal boxes have been created to ensure smooth assembly and customer satisfaction. Simply assemble the box, place your products inside and close with the adhesive strip.

Secure closure design prevents tampering in the supply chain

The design of our secure postal boxes stops people putting their finger through the flaps, so products cannot easily be interfered with during shipping. 

Frustration-free unboxing experience

You only have one chance to create a great first impression. In e-commerce, the first physical link between your business and your customers is your packaging. At DS Smith, we understand that a perfect customer unboxing experience is key to ensure customer satisfaction and reinforce the power of your brand.

With our mailers’ easy-opening tear strip, your customer can open the packaging quickly and safely, no need for scissors or knives. Even a child can open it easily – that’s why we call it a frustration-free unboxing experience.

100% recyclable boxes made from recycled paper

DS Smith is a leading supplier of sustainable packaging solutions. We produce boxes for our customers, collect them once they have been used, and recycle them back into more boxes. It takes only two weeks for paper fibre to move around our business, and we handle over 5 million tonnes every year. That is the weight of 25 000 jumbo jets!

Are you interested in ordering larger quantities?

Please contact us via email at


How to measure a box?

When measuring a cardboard box, it is important to consider three key dimensions: length, width and height. These measurements provide the internal dimensions of the carton, allowing you to define the space available to pack products and ensure they fit properly.

The dimensions provided on our website are in Millimetres and are following the order LENGTH x WIDTH X HEIGHT.

To measure correctly a cardboard box follow these instructions:

1. Length: start by measuring the longest side of the box base

2. Width: rotate the box 90 degres and measured the other side of the box base

3. Height:measure the distance from the base to the top

How to easily assemble your Secure Postal Boxes?



What makes ePack sustainabile?

In today's society, sustainability has become a key focus. Consumers who are conscious about the environment are demanding eco-friendly packaging solutions. DS Smith ePack offers packaging solutions that are 100% eco-friendly, using fibres from responsible sources to combat deforestation. They use recycled or virgin paper from a certified chain of custody, and their corrugated cardboard packaging is both recyclable and biodegradable.

DS Smith ePack prioritizes sustainability by using responsible sources, recycled or virgin paper, and recyclable and biodegradable materials. Consumers consider sustainability as a crucial factor in their purchasing decisions, and non-sustainable packaging can lead to negative consequences for companies. Eco-friendly packaging not only benefits the environment but also improves brand image and reduces the carbon footprint.

What is our Circular Design Metrics?

One of the most important principles of the circular economy is designing for circularity, which involves products and services being designed with their end-of-life in mind, making it easier to recover and regenerate materials.

DS Smith has developed a series of circular design metrics which give us an accurate picture of the degree of implementation of circular design principles in the production of our packaging solutions and provide quantifiable data to show how circular a given packaging solution is and allow quick identification of the areas of improvement required.

Our Circular Design Metrics measure Supply Chain Optimisation, Recyclability, Planet Safety, Material Utilisation, Renewable Sources, Recycled Content, the Carbon Footprint and Design for Reuse.

* This circularity information was made by using the information of an average secure postal box.

What does FSC label means?

FSC (Forest Stewardship Council) labelled paper is an important choice for individuals and businesses looking to prioritize sustainability and responsible forest management. Using FSC labeled paper offers numerous benefits. It supports responsible forest management, reduces environmental impacts, promotes social responsibility, meets consumer demand for sustainable products, and ensures compliance with regulations and standards. By choosing FSC labeled paper, individuals and businesses can make a positive impact on the environment and contribute to a more sustainable future.

Postal Guide

One of the easiest ways to derive the maximum benefit from your deliveries is to use the postal option that is most closely tailored to your product and that aligns perfectly with the standards, dimensions and weights stipulated by the Royal Mail, ensuring you keep prices as low as possible for you and your customers and reducing difficulties with delays and damaged packages. This allows your business to keep the processing of orders and shipping as streamlined as possible, saving you time and money.

Letter Large letter Small parcel Medium parcel Large parcel
Maximum length 240 mm 353 mm 450 mm 610 mm > 610 mm
Maximum width 165 mm 250 mm 350 mm 460 mm > 460 mm
Maximum height 5 mm 25 mm 160 mm 460 mm > 460 mm
Maximum weight 100 g 750 g 2 kg 20 kg 30 kg

Epack offers a full range of Royal Mail-compliant envelopes and parcels for all your delivery needs, including two envelope types and three parcel types.

The letter and large letter envelopes can take weights of up to 750 grams, making them ideal for greeting cards, folded and unfolded letters, magazines and small objects such as DVDs or plastic cards. By using the standard Royal Mail dimensions, you ensure that your shipping costs as little as possible, is less likely to experience delays, and will fit standard mail slots in the UK, minimising delivery problems and the administrative burden of lost and damaged packages. The two different sizes allow you to tailor your packaging to the letter content, allowing you to minimise costs for simple document shipping with standard letters.

Royal Mail parcels come in three sizes – small, medium and large – and can accommodate items from 2 kg up to 30 kg. Whether your company specialises in clothing, electronics or games and entertainment, any potential product offered by your business will find the perfect parcel type to match and provide the necessary size and weight capacity to ensure smooth and safe delivery with adequate protective packaging.


Created by Heipifrom the Noun Project