Postal Cardboard Boxes

Discover RAJA UK's postal box range, designed to protect your products, streamline your shipping process, and save on costs. Whether you're a small business, a growing e-commerce brand, or a large-scale distributor, our high-quality postal boxes offer secure, efficient, and professional packaging for every order.

With a wide selection available, from small white postal boxes to extra-large cardboard postal boxes, we help you find the perfect fit for any item, every time. Plus, our postal packaging is recyclable, whilst being made from recycled materials to help you meet sustainability goals without compromising on quality.

With over 70+ years of packaging experience our UK team supports businesses from startups to high-volume fulfilment centres. Whether you're dispatching fragile items, or scaling your packaging operations, our range of eco-friendly postal boxes is built to perform and protect.

Expertly designed for the UK's top courier networks

Our cardboard postal boxes are made to match key courier requirements including Royal Mail, DHL, DPD, Evri, and more. Avoid surcharges and shipping delays with packaging that works with your delivery network. 

• DHL postal box options designed to DHL's postal standards
• DPD postal box compliant sizes for fast, safe transit
• Evri postal box choices for optimised courier rates

From flat pack boxes like our fast-assembly white postal boxes to secure postal tubes for delicate items like artwork, prints or documents, or large postal boxes; RAJA ensures you can post every product with confidence.

Need to send books or media? Our book boxes are tailor-made for snug, safe shipping.

What’s the difference between postal boxes & regular boxes?

Unlike standard cardboard boxes, posting boxes in this category are optimised for mailing efficiency. Many come with peel-and-seal strips, self-locking designs, or fast-assembly features with no tape required. Perfect for fast-paced businesses looking to cut packing time without sacrificing protection.

Most postal boxes are also designed around standard sizing formats (A4, A5), helping you avoid unnecessary shipping fees by keeping your packages within Royal Mail or courier-specific limits. Whether you need extra-flat postal boxes for documents or extra small parcel postal boxes for ecommerce orders, we have the right solution for your product.

And for added safety, pair your postal box with protective packaging like bubble wrap or paper packaging to ensure your items arrive in perfect condition.

How to seal a postal box

Sealing your postal box correctly is essential to protect your products in transit and present a professional finish. Most of our postal boxes come with built-in adhesive strips or locking tabs, making the process quick and secure without the need for extra tape; however we do recommend sealing for extra security and peace of mind.

For boxes without self-seal closures, we recommend using strong packaging tape across all openings. Apply the tape in an 'H' pattern for added strength; covering the centre seam and both side edges. For fragile or heavy items, use a reinforced filament tape and consider a double-wall postal box for extra protection.

Need a more sustainable sealing method? Try our paper tape options, which are fully recyclable and ideal for eco-conscious businesses.

Post products with confidence

At RAJA, sustainability is more than a promise; it's part of our product design. Our cardboard postal boxes are recyclable and made from recycled materials, helping you reduce your carbon footprint and packaging waste.

We also offer:

• Bulk discounts for businesses looking to save on large orders
• Next day delivery for time-sensitive shipments
• Customised packaging to personalise your postal boxes with brand logos, messaging, or unique sizes to make your brand stand out.

Not sure what you need? Our expert packaging advisors are here to help you choose the best postal boxes or even design a custom solution just for you.

FAQs

Which cardboard postal boxes are suitable for heavy or fragile objects?

We recommend our double-wall cardboard postal boxes, like the DPD and DHL courier boxes, designed for extra durability. Combine with protective packaging for added security.

What is the estimated delivery time for RAJA posting boxes?

Most orders are dispatched within 24 hours, with next-day delivery available across most of the UK for in-stock items.

Can I recycle RAJA's cardboard postal boxes?

Yes, all our cardboard postal boxes are 100% recyclable, with many made using recycled content. Learn more about how to dispose of cardboard boxes sustainably.

Do postal boxes come with adhesive closures?

Yes, several of our posting boxes feature built-in adhesive strips or locking tabs for secure, tape-free sealing.

Get the perfect postal box today

RAJA's extensive range of postal boxes helps your business save time, reduce costs, and deliver products securely and sustainably. Browse our collection or get in touch with our team for tailored advice and custom solutions.