Best Heavy Duty Box Mailers of 2025

Jordan Akhtar Avatar
Jordan Akhtar
Last Updated: 7 Feb 2025

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Heavy Duty Box Mailers are a reliable solution for shipping products that require a higher level of protection during transit. These mailers are made of durable materials that can withstand the rigours of shipping and handling. They come in a variety of sizes to accommodate different products and can be easily assembled for quick and hassle-free use. The strong construction of these mailers ensures that your products arrive at their destination in good condition, making them an ideal choice for businesses or individuals looking to ship their products securely.

At a Glance: Our Top Picks

AKAR Double Wall Heavy Duty Cardboard Boxes Cover #TOP 1
AKAR Double Wall Heavy Duty Cardboard Boxes
ftb score rating icon 9.8
Sunrise Packaging Extra Large Cardboard Box Cover #TOP 2
Sunrise Packaging Extra Large Cardboard Box
ftb score rating icon 9.7
Extra Large Heavy Duty Cardboard Box Cover #TOP 3
Extra Large Heavy Duty Cardboard Box
ftb score rating icon 9.5

Top 10 Heavy Duty Box Mailers

#TOP 1

AKAR Double Wall Heavy Duty Cardboard Boxes

AKAR-DW-18x12x12-5
Brown
AKAR Double Wall Heavy Duty Cardboard Boxes Cover
5 x AKAR 457 x 305 x 305mm - A3 Medium Size - Double Wall 18x12x12"" Shipping Mailing Parcel Postal Brown Heavy Duty Cardboard Boxes

The AKAR Heavy Duty Boxes are designed for your packaging and mailing needs. Their double wall construction ensures that your items are well-protected during transit. Ideal for sending parcels or archiving office items, these boxes provide a practical solution for both personal and business use. Delivered flat, they are easy to assemble, saving you time and effort when preparing your shipments.

What We Like
Durable double wall construction
Easy to assemble
Ideal for mailing and packaging
Recyclable materials
#TOP 2

Sunrise Packaging Extra Large Cardboard Box

White
Large
Sunrise Packaging Extra Large Cardboard Box Cover
Sunrise Packaging 1 x Extra Large Heavy Duty Double Wall Cardboard Box Size 24 x 18 x 18/610 x 457 x 457mm Durable, Recyclable and Reusable House Moving Removal Strong Storage Box

The Sunrise Packaging Box is a robust solution for your moving and storage needs. Measuring 24 x 18 x 18 inches, this extra-large double wall cardboard box is designed to withstand heavy items, ensuring your belongings are well-protected during transport. Its durable construction means you can reuse it multiple times, making it an eco-friendly choice as well. Plus, being recyclable adds to its convenience, allowing you to dispose of it responsibly when no longer needed.

What We Like
Very strong construction
Extra large size
Recyclable material
Reusable design
#TOP 3

Extra Large Heavy Duty Cardboard Box

3358142323974
Brown
Extra Large Heavy Duty Cardboard Box Cover
1 Strong Heavy Duty Double Wall Cardboard Box Extra Large Size 24 x 18 x 18" / 610 x 457 x 457mm Thick Packaging Packing House Moving Removal Mailing Shipping Postage Carton

The UKPS Heavy Duty Box is crafted from strong, sturdy corrugated cardboard, ensuring durability for all your packing needs. With a thickness of approximately 7mm, this box provides excellent strength for storage, shipping, or house removals. Its generous size makes it perfect for transporting larger items safely. The kraft brown finish not only adds a professional touch but also allows for easy labelling, helping you keep your belongings organised during a move or shipment.

What We Like
Strong and sturdy construction
Ideal for moving and shipping
Generous internal dimensions
Easy to label and organise
#TOP 4

Assorted Collections Large Lockable Mail Box

WM-Grey
Grey
24W x 17D x 44H
Assorted Collections Large Lockable Mail Box Cover
Assorted Collections Wall Mounted Post Box Classic Grey Large Letter Box Lockable With 2 Keys, Heavy Duty Cast Iron Mail Box Weatherproof Mailbox Easy To Install ‎24 x 17 x 44 cm, 11.8 kg

The Assorted Collections Mail Box is a robust and stylish solution for your postal needs. Its durable cast iron construction ensures your mail is secure and protected from the elements. With ample storage space, you can easily store letters, magazines, and small parcels without worry. The timeless design adds elegance to your home's exterior, enhancing its curb appeal. Plus, installation is effortless, allowing you to mount it quickly and securely for peace of mind.

What We Like
Durable cast iron construction
Ample storage space
Timeless elegant design
Easy installation
Weatherproof protection
#TOP 5

AKAR Medium Double Wall Cardboard Boxes

AKAR-DW-16x16x16-5
Brown
AKAR Medium Double Wall Cardboard Boxes Cover
5 x AKAR 406 x 406 x 406 mm Medium Size Double Wall 16x16x16"" Shipping Mailing Parcel Postal Brown Heavy Duty Cardboard Boxes

The AKAR Cardboard Boxes are perfect for your shipping and packaging needs. Made from double wall heavy-duty cardboard, they provide excellent protection for your items. These boxes are delivered flat, making them easy to store and assemble when you need them. Whether you're archiving documents in your office or sending products via a courier service, these boxes offer the versatility and convenience you require. Plus, being 100% recyclable, they are an environmentally friendly choice.

What We Like
Heavy-duty protection
Easy to assemble
Versatile for various uses
Environmentally friendly
#TOP 6

StorePAK Heavy Duty Storage Boxes, 64 Litres

R10825
Brown
MEDIUM (Pack of 10)
StorePAK Heavy Duty Storage Boxes, 64 Litres Cover
StorePAK Heavy Duty Medium Storage Boxes – Strong Archive Cardboard Boxes with Handles, 64 Litres - H40.5 x W40.5 x D40.5cm (Pack of 10), Brown

The StorePAK Storage Boxes are made from strong cardboard, ensuring they are durable and suitable for multiple uses. You can stack them easily, saving space during storage. They are crafted from 100% recycled cardboard, making them environmentally friendly and fully recyclable. The boxes come flat packed for your convenience, allowing you to set them up quickly when needed. Their integrated handles make lifting and transporting your items comfortable and effortless.

What We Like
Durable and strong construction
Environmentally friendly materials
Easy to set up and store
Comfortable lifting handles
#TOP 7

Heavy Duty Cardboard Moving Storage Boxes

STR12
Brown
10 Pack
Heavy Duty Cardboard Moving Storage Boxes Cover
Cardboard Moving Storage Boxes Heavy Duty 42 Litre 18x12x10" Packing Moving Home Kit (10 Pack)

The STAR SUPPLIES Moving Boxes are an ideal solution for anyone planning a move. With a generous size of 18x12x10 inches, these reusable and stackable boxes allow you to efficiently pack your belongings. Each box is pre-printed with labels for different rooms, making it easy for you to organise your items. Manufactured in the UK from robust material, they are designed to handle the rigours of moving. Plus, the built-in carry handles provide added convenience for transporting your boxes with ease.

What We Like
Reusable and stackable design
Pre-printed room labels
Robust UK manufactured material
Built-in carry handles
#TOP 8

Wellpack Europe Medium Heavy Duty Cardboard Boxes

18x12x12Inch
Brown
Wellpack Europe Medium Heavy Duty Cardboard Boxes Cover
Wellpack Europe 5 Medium Heavy Duty Flat Pack Cardboard Boxes Moving House Storage Double Walled

The Wellpack Europe Cardboard Boxes are perfect for all your packing needs. This pack of five medium-sized boxes, measuring 18x12x12 inches, can hold up to 40 litres of items, making them ideal for moving house or storing belongings. Their strong and sturdy construction ensures that your items remain safe during transport. Made from double-walled corrugated cardboard, these boxes provide excellent protection for your possessions. Additionally, they arrive flat packed, making them convenient to store and easy to transport.

What We Like
Durable double-walled construction
Suitable for various uses
Pack of five boxes
Space-saving flat pack design
Generous storage capacity
#TOP 9

Extra Large Heavy Duty Cardboard Boxes

3305054621575
Brown
Extra Large Heavy Duty Cardboard Boxes Cover
5 Strong Heavy Duty Double Wall Cardboard Boxes Extra Large XL Size 24 x 24 x 24" / 610 x 610 x 610mm 24 Inch Cubes Thick Packaging Packing House Moving Removal Mailing Shipping Postage Cartons

These UKPS Cardboard Boxes are made from strong, sturdy corrugated cardboard with a kraft brown finish. With a thickness of approximately 7mm, they offer excellent durability for your storage and shipping needs. The generous size of 24 x 24 x 24 inches makes them ideal for house moving or removals, allowing you to pack large items securely. Whether you're mailing packages or organising your home, these boxes provide convenience and reliability to keep your belongings safe.

What We Like
Strong and sturdy construction
Thick cardboard for durability
Ideal for storage or shipping
Generous extra-large size
#TOP 10

AKAR Double Wall Cardboard Moving Boxes

AKAR-DW-18x18x12
Manilla
AKAR Double Wall Cardboard Moving Boxes Cover
18x18x12""|| 457 x 457 x 305mm || AKAR Double Wall Cardboard Boxes Mailers Cardboard Postage Boxes Shipping Boxes Moving Packing Storage Boxes Strong Boxes Postal Box Posting Box [Pack Of 1]

AKAR Cardboard Boxes are ideal for all your moving and shipping needs. Constructed from strong double-wall corrugated cardboard, these boxes provide excellent protection for your fragile items during transport. They are eco-friendly and delivered flat-packed, making them easy to assemble and store. The multiple uses of these boxes make them suitable for various products, from electronics to clothing, ensuring you can pack efficiently for any occasion.

What We Like
Strong and durable construction
Eco-friendly and easy to assemble
Suitable for various items
Flat-packed for convenience
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is the strongest cardboard box?

The strongest corrugated cardboard is triple wall corrugated cardboard, constructed with four sheets of carton board and three sheets of corrugated board. This cardboard is used to package large items such as refrigerators and treadmills.

2. How much weight can heavy duty boxes hold?

The maximum weights range from around 20 pounds for standard cardboard boxes to 60–150 pounds or corrugated and double-walled boxes, with some corrugated triple-walled boxes carrying up to 300 pounds.

3. Which boxes are best for shipping?

Corrugated cardboard makes the best material for shipping boxes. Boxes made of corrugated cardboard are sturdy enough to ensure the safe packaging and shipping of fragile items.

Editor's Notes

During our heavy duty box mailer research, we found 168 heavy duty box mailer products and shortlisted 10 quality products. We collected and analyzed 17,456 customer reviews through our big data system to write the heavy duty box mailers list. We found that most customers choose heavy duty box mailers with an average price of £17.40.

The heavy duty box mailers are available for purchase. We have researched hundreds of brands and picked the top brands of heavy duty box mailers, including AKAR, Sunrise Packaging, UKPS, Assorted Collections, StorePAK. The seller of top 1 product has received honest feedback from 566 consumers with an average rating of 4.8.

Written by
Jordan Akhtar Avatar

Jordan Akthar owns one stationery store in Bradford, and another in Derby. He started with a corner bookshop, and now the rest is history. He is often found in his stores taking count of inventories of books and stationery. Jordan also likes to write, and this drove his passion for writing articles on stationery maintenance. He owns a blog, where in his free time, he would write DIY tips on how you can recycle and refine your stationeries.