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  1. ​Products ​
  2. ​Postal Packaging
  3. Cardboard Mailer Envelopes

Cardboard Mailer Envelopes

Cardboard Envelopes & Mailers — All Board, Corrugated & Capacity Mailers

Browse our range of cardboard envelopes and mailers for ecommerce, retail, and postal use. Our cardboard envelope range covers all board mailers, corrugated cardboard envelopes, capacity mailers, and rigid envelopes — all with peel and seal closures for fast, tape-free packing on high-volume despatch lines.

Cardboard envelopes provide significantly better bend and corner protection than standard paper envelopes or padded bags — making them the preferred choice for sending books, documents, photographs, certificates, greetings cards, and slim flat products that must arrive in perfect condition. Most sizes in our range are compatible with Royal Mail's Large Letter format, helping you keep postage costs to a minimum on eligible items.

Available in bulk case quantities from our Coventry warehouse with fast UK-wide delivery. Call 02476 611234 for advice on the right envelope size and grade for your products.  View Product Range

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  • More about Cardboard Envelopes
  • Corrugated Envelopes
  • FAQs about Cardboard Envelopes
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Cardboard Mailer

Cardboard Mailers

Corrugated Cardboard Envelope

Corrugated Envelopes

A5 Cardboard Envelope

A5 Cardboard Envelope

A4 Cardboard Envelope

A4 Cardboard Envelope

A3 Cardboard Envelope

A3 Cardboard Envelope

Cardboard Envelope

All Cardboard Envelopes

Types of Cardboard Envelope: All Board Mailers vs Corrugated Envelopes — Which Do You Need?


All board mailers are manufactured from solid board (typically 350–400gsm) — flat, rigid, and lightweight. They're the standard choice for documents, photographs, greetings cards, and slim flat items where weight matters for postage costs. Corrugated cardboard envelopes use a fluted corrugated board construction — slightly heavier but significantly stronger, offering better puncture resistance and edge protection for more valuable or fragile items. Capacity mailers have a built-in expansion crease that allows the envelope to open to a depth of 30–55mm, accommodating slim but bulky items like boxed gifts, DVDs, or stacked cards while still qualifying for cheaper postage rates.


Cardboard Envelopes and Royal Mail Postage Sizes


Many of our cardboard envelopes are sized to fit within Royal Mail's Large Letter format (max 353mm x 250mm x 25mm), Small Parcel format, or Medium Parcel format — allowing you to choose the cheapest postage band your items qualify for. Using a correctly-sized cardboard envelope rather than a box can save significant postage costs across high-volume despatch operations. Call 02476 611234 and we'll advise on which envelope sizes fall within each Royal Mail postage band.


Cardboard Envelopes: Eco-Friendly Protection and Professional Presentation

Introducing our eco-friendly and versatile cardboard envelopes – the ideal solution for safe and stylish shipping. Whether you're a small business owner or an individual seller, these sturdy and sustainable envelopes are designed to protect your products during transit while making a lasting impression on your customers. Discover the benefits and features of our cardboard envelopes, and elevate your packaging game to a whole new level.

1. Sustainable Packaging Solution: At Datec Packaging UK, we are committed to minimizing our environmental impact. Our cardboard envelopes are crafted from recycled and recyclable materials, ensuring a sustainable packaging solution that aligns with your eco-conscious values. By choosing these envelopes, you can contribute to reducing single-use plastic waste and promote a greener approach to e-commerce.

2. Excellent Product Protection: The strong and durable construction of our cardboard envelopes guarantees optimal protection for your products. The rigid cardboard material prevents bending, folding, or creasing, ensuring that your items reach your customers in pristine condition. Whether you're shipping documents, photographs, or small items like jewelry and accessories, our envelopes will safeguard your products during transit.

3. Lightweight and Cost-Effective: Cardboard envelopes are lightweight, which translates to cost savings in shipping. With lower shipping costs, you can offer competitive pricing to your customers or invest more in other aspects of your business. The lightweight nature of these envelopes also reduces the overall carbon footprint of your shipments, contributing to a more sustainable shipping process.

4. Customizable Branding Opportunities: Our cardboard envelopes provide an excellent canvas for showcasing your brand identity. Add your company logo, tagline, or a custom design to the envelopes, and create a memorable unboxing experience for your customers. Branded packaging not only adds a professional touch but also reinforces brand recognition, encouraging repeat business and customer loyalty.

5. Versatility for Various Products: Cardboard envelopes come in various sizes to accommodate a wide range of products. From documents and photographs to clothing items, crafts, and more, these envelopes offer a versatile packaging solution for different types of businesses. Whether you're shipping domestically or internationally, our envelopes are designed to meet your specific packaging needs.

6. Easy to Use and Seal: Our cardboard envelopes are designed with a convenient peel-and-seal adhesive strip. This user-friendly feature allows for hassle-free packaging, saving you time and effort during the shipping process. Simply peel off the protective strip, press the flap down, and your envelope is securely sealed, ready for shipment.

7. Professional Presentation: When it comes to e-commerce, presentation matters. Our cardboard envelopes not only protect your products but also present them in a professional and polished manner. Your customers will appreciate the care you put into packaging their orders, which can lead to positive reviews, word-of-mouth referrals, and enhanced brand reputation.

In conclusion, our cardboard envelopes offer a sustainable, cost-effective, and versatile packaging solution for your e-commerce needs. With their excellent product protection, branding opportunities, and professional presentation, these envelopes are designed to make a lasting impression on your customers. At Datec Packaging UK, we are committed to providing high-quality packaging solutions that meet your business requirements while staying mindful of the environment. Choose our cardboard envelopes today, and elevate your shipping experience with style and sustainability.

This style of packaging envelope is used by some of the largest ecommerce fulfilment operations in the country including Amazon, they find them a great solution for sending all kinds of small and flat items such as books, catalogues, games, soft home furnishings, toys, prints, calendars, and much more! Our packaging envelope range covers both a solid board rigid envelope and envelopes manufactured from a corrugated cardboard. The solid board rigid envelope is a low cost option for ecommerce stores that are shipping high volumes of small orders, while the corrugated cardboard versions offer more protection and higher strength. Both the solid board and corrugated card variations are perfect to use as packaging envelopes for a wide range of online orders.

Corrugated Envelopes

Corrugated envelopes, also known as corrugated mailers or corrugated cardboard envelopes, are protective packaging solutions designed to securely transport and protect flat or thin items. They are made from corrugated cardboard, which consists of three layers: two outer flat layers (liners) and a central wavy layer (fluting). This construction provides strength, durability, and cushioning to the envelope.

Features and Benefits of Corrugated Envelopes:

  1. Protection: Corrugated envelopes offer a higher level of protection compared to traditional paper or plastic envelopes. The corrugated structure absorbs impacts, preventing damage to the contents during transit.
  2. Versatility: They are suitable for a wide range of flat or thin items, including documents, photos, artwork, books, small electronics, CDs/DVDs, and more.
  3. Customizable Sizes: Corrugated envelopes come in various sizes, allowing you to choose the dimensions that best fit your items. Some envelopes have a peel-and-seal adhesive strip for easy closure.
  4. Eco-Friendly: Corrugated envelopes are often made from recycled materials and can be recycled again after use. Using them aligns with eco-conscious packaging practices.
  5. Professional Appearance: The sturdy and clean look of corrugated envelopes adds a professional touch to your packaging, enhancing your brand image and customer perception.
  6. Cost-Effective: Corrugated envelopes provide a cost-effective alternative to traditional packaging methods, as they require minimal additional cushioning materials.
  7. Lightweight: Despite their durability, corrugated envelopes are relatively lightweight, which can help save on shipping costs compared to heavier packaging options.
  8. Easy Labeling: The flat surface of corrugated envelopes makes it easy to affix shipping labels, barcodes, and stamps for efficient handling and tracking.
  9. Uniqueness: Using corrugated envelopes can help your shipments stand out and leave a memorable impression on recipients, especially when custom branding or designs are applied.
  10. Space-Saving: Corrugated envelopes are slim and take up less storage space compared to bulkier packaging solutions, making them efficient for both storage and shipping.
  11. Minimal Waste: With corrugated envelopes, you can reduce the need for excess packaging materials like bubble wrap or foam peanuts, minimizing waste and promoting sustainability.

Corrugated envelopes are an excellent choice for businesses and individuals seeking reliable, protective, and eco-friendly packaging for flat or thin items. Whether you're shipping important documents or delicate merchandise, these envelopes offer a combination of strength, versatility, and cost-effectiveness.

Corrugated envelopes are great for packaging eCommerce orders because they are so fast and easy to use. If you need a mailer with better protection than a bubble lined mailer or is faster to load than a book wrap look no further than our range of Corrugated Card Envelopes. You can use our corrugated envelope mailers to pack anything that is relatively flat such as books, catalogues, games, soft home furnishings, toys, prints, calendars, and much more! Corrugated cardboard envelopes are manufactured from strong, stiff, e-flute corrugated cardboard and as a result offer very high corner protection levels and puncture resistance. All sizes come with a peel & seal closure strip and a tear strip for easy opening.

Rigid Cardboard Envelopes

Rigid envelopes are a great alternative to bubble lined mailing bags. With our stiff card envelopes you get up to 3 times more per pallet, great for saving storage space. And because they are more rigid and offer better corner protection, most online stores find they get big reductions in damages when they swap over. The other thing about our rigid envelope mailers is they are biodegradable and easy to recycle. There's no plastic, just eco friendly paper based card that contains a high percentage of recycled material itself.

Cardboard Mailers & Rigid Capacity Envelopes

Cardboard mailers and rigid capacity envelopes are postal envelopes made from solid wall cardboard that gives a strong water resistant envelope suitable for many small online orders. They are a great alternative to jiffy bags as they are more rigid and give better corner protection as well as higher puncture resistance. Cardboard rigid envelopes are also super fast so are very popular with high volume eCommerce stores. The envelope style that is easy to open and slide items in without snagging will help you pack your e-commerce orders at high speed and increase packing bench throughput. Our range of cardboard rigid envelopes have a high recycled content and durable construction makes these one of the most protective, eco-friendly, and cost effective mailers in our range. All sizes come with a peel & seal closure strip and a tear strip for easy opening.

Corrugated Cardboard Envelope Mailers for Prints

If you are looking for cardboard photo mailers or other corrugated cardboard envelope mailers for prints, you've just found the perfect solution! Our range of corrugated cardboard envelopes are brilliant for keeping photos and prints flat and free from creases. The strong fluted cardboard makes these photo print mailers very rigid so they don't bend easily, and they come in so many different sizes you're sure to find one that fits perfectly. These cardboard mailers can also hold items up to 50mm thick so they are great to use as photo frame mailers as well. For sending heavy photo frames you can also take a look at our photo frame packaging box, these are even stronger and more protective than our photo mailer envelopes!

Large Format Cardboard Mailing Wallets

The mailing solution for large format signs, posters & other media. These wallets can be ordered either stitched, glued or taped depending on your preference. Ask our Sales Team for more info if you are unsure which option to go for. (sizes are internal usable sizes). These are also available in bespoke sizes and with or without a top flap.

Frequently Asked Questions on Cardboard Mailers


What can Cardboard Mailers be Used For?

Cardboard mailers can be used for many different items, most small items up to 40mm thick that are a similar size to items like paperback books, DVDs, photo frames, cosmetics, and small electronic items, can be packed in these.

Do Cardboard Mailers give more Protection than a Bubble Mailer?

Cardboard mailers give more rigidity and higher corner protection than bubble mailers. This is because the cardboard is stiffer than bubble, which helps to prevent creasing, and allows the corners to absorb much more impact.

Are Cardboard Mailers More Eco Friendly than a Bubble Mailer?

Cardboard mailers are made only from cardboard which makes them easier to recycle than bubble mailers. The cardboard also uses a very high level of recycled material and is biodegradable too. These 3 aspects make them a more sustainable and eco friendly packaging option.

Custom Cardboard Envelopes: Elevate Your Brand with Personalized Packaging

Custom cardboard envelopes offer a powerful way to leave a lasting impression on your customers while protecting your products during transit. At Datec Packaging UK, we take pride in providing high-quality custom packaging solutions that cater to your unique needs. Let's explore the benefits of our custom cardboard envelopes and how they can elevate your brand identity.

1. Branding and Personalization: Stand out from the competition by customizing your cardboard envelopes with your brand logo, colors, and messaging. Our printing capabilities allow you to create a cohesive and eye-catching design that reflects your brand's personality. Custom branding on the envelopes not only reinforces brand recognition but also adds a professional touch to your packaging.

2. Unmatched Product Protection: Our custom cardboard envelopes are crafted from durable and rigid materials, providing unparalleled protection for your products. Whether you're shipping documents, photographs, promotional materials, or small items, our envelopes ensure that your products arrive at their destination in pristine condition.

3. Versatility and Custom Sizing: We understand that every product is unique, and one size does not fit all. That's why we offer custom sizing options for our envelopes to accommodate a wide range of products. Whether you need small envelopes for jewelry or larger ones for clothing items, we've got you covered.

4. Sustainability and Environmental Responsibility: At [Your Company Name], we are committed to sustainability. Our custom cardboard envelopes are made from recycled and recyclable materials, minimizing our environmental impact. By choosing our eco-friendly packaging, you can align your brand with environmentally-conscious values and attract eco-conscious customers.

5. Professional Presentation: Packaging is a crucial part of the customer experience. Our custom cardboard envelopes not only protect your products but also present them in a professional and elegant manner. Your customers will appreciate the attention to detail, enhancing their overall shopping experience.

In conclusion, our custom cardboard envelopes offer a winning combination of branding opportunities, product protection, versatility, and sustainability. Elevate your brand identity with personalized packaging that stands out from the crowd. Partner with Datec for custom packaging solutions that leave a lasting impression and demonstrate your commitment to excellence and environmental responsibility.

Cardboard envelopes can be custom printed with your logos and messages in your brand colours. Personalising cardboard envelopes can range from a cost effective single colour print to a full colour litho print, depending on your budget and branding requirements. Get in touch with our team today to discuss your custom cardboard envelope ideas.


  • Book Wraps
  • PiP Postal Boxes
  • LP Record Mailers
  • ​Mailing Bags
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[TPCCBE01] 150 x 250 x 0-50mm Corrugated Board Envelope (Box of 100)
150 x 250 x 0-50mm Corrugated Board Envelope (Box of 100)
£ 45.12
[TPCCBE02] 185 x 270 x 0-50mm Corrugated Board Envelope (Box of 100)
185 x 270 x 0-50mm Corrugated Board Envelope (Box of 100)
£ 54.23
[TPCCBE03] 215 x 300 x 50mm Corrugated Board Envelope (Box of 100)
215 x 300 x 50mm Corrugated Board Envelope (Box of 100)
£ 62.43
[TPCCBE04] 235 x 340 x 35mm Corrugated Board Envelope (Box of 100)
235 x 340 x 35mm Corrugated Board Envelope (Box of 100)
£ 69.54
[TPCCBE05] 250 x 340 x 50mm Corrugated Board Envelope (Box of 100)
250 x 340 x 50mm Corrugated Board Envelope (Box of 100)
£ 61.88
[TPCCBE06] 250 x 360 x 50mm Corrugated Board Envelope (Box of 100)
250 x 360 x 50mm Corrugated Board Envelope (Box of 100)
£ 76.24
[TPCCBE07] 290 x 400 x 50mm Corrugated Board Envelope (Box of 100)
290 x 400 x 50mm Corrugated Board Envelope (Box of 100)
£ 88.34
[TPCCBE08] 340 x 500 x 50mm Corrugated Board Envelope (Box of 100)
340 x 500 x 50mm Corrugated Board Envelope (Box of 100)
£ 117.66
[TPCCBE10] 530 x 720 x 50mm Corrugated Board Envelope (Pack of 20)
530 x 720 x 50mm Corrugated Board Envelope (Pack of 20)
£ 60.88
[TPCCBE09] 570 x 420 x 50mm Corrugated Board Envelope (Box of 50)
570 x 420 x 50mm Corrugated Board Envelope (Box of 50)
£ 104.98
[TPSBE10] Tufpac 194 x 292mm Capacity Cardboard Envelope (Box of 100)
Tufpac 194 x 292mm Capacity Cardboard Envelope (Box of 100)
£ 28.44
[TPSBE20] Tufpac 234 x 334mm Capacity A4 Cardboard Envelope (Box of 100)
Tufpac 234 x 334mm Capacity A4 Cardboard Envelope (Box of 100)
£ 31.05
[TPSBE23] Tufpac 249 x 352mm Large Letter Cardboard Envelopes (Box of 100)
Tufpac 249 x 352mm Large Letter Cardboard Envelopes (Box of 100)
£ 43.44
[TPSBE30] Tufpac 278 x 400mm Capacity Cardboard Envelope (Box of 100)
Tufpac 278 x 400mm Capacity Cardboard Envelope (Box of 100)
£ 52.17
[TPSBE40] Tufpac 467 x 321mm Capacity A3 Cardboard Envelope (Box of 100)
Tufpac 467 x 321mm Capacity A3 Cardboard Envelope (Box of 100)
£ 65.62
[TPSBE05] Tufpac 180 x 235mm Capacity A5 Cardboard Envelope (Box of 100)
Tufpac 180 x 235mm Capacity A5 Cardboard Envelope (Box of 100)
£ 26.15

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