Double Wall Cardboard Boxes
Double Wall Cardboard Boxes
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£2.88 inc. VAT each
Product Information
Product Information
Our brown double walled cardboard boxes are designed for heavier items, fragile shipments, and e-commerce orders where extra strength matters. Made from double wall B/C flute corrugated board, these boxes give you a sturdier, more impact-resistant postal box compared to single wall alternatives, helping protect your goods through storage and transit.
All sizes arrive flat-packed for easy storage and assemble quickly when needed. They’re a popular choice for online retailers, warehouse packing benches, and even removals use where dependable stacking strength is important. For best results, we recommend sealing with quality packaging tape to ensure a secure close in transit.
Key Benefits
- Double wall protection: two layers of corrugated board for superior strength
- Ideal for heavier items: helps resist crushing and punctures
- Flat-packed delivery: saves space until you’re ready to use them
- Professional presentation: clean brown kraft finish inside and out
- Royal Mail compatible: sizes fall into Small Parcel or Medium Parcel PiP categories
Size Guide – Double Walled Cardboard Boxes
- 229x229x229mm: PiP Medium Parcel – Internal: 229x229x229mm – External: 240x240x240mm – SKU: MCP-BX-B-229x229x229-PSUK & MCP-BX-B-229x229x229
- 254x254x254mm: PiP Medium Parcel – Internal: 254x254x254mm – External: 270x270x270mm – SKU: MCP-BX-B-254x254x254-PSUK & MCP-BX-B-254x254x254
- 305x229x152mm: PiP Small Parcel – Internal: 305x229x152mm – External: 320x240x165mm – SKU: MCP-BX-B-305x229x152-PSUK & MCP-BX-B-305x229x152
- 305x305x152mm: PiP Small Parcel – Internal: 305x305x152mm – External: 320x320x165mm – SKU: MCP-BX-B-305x305x152-PSUK & MCP-BX-B-305x305x152
- 305x305x305mm: PiP Medium Parcel – Internal: 305x305x305mm – External: 320x320x320mm – SKU: MCP-BX-B-305x305x305-PSUK & MCP-BX-B-305x305x305
- 440x340x140mm: PiP Small Parcel – Internal: 440x340x140mm – External: 450x350x155mm – SKU: MCP-BX-B-440x340x140-PSUK & MCP-BX-B-440x340x140
Product Details
- Material: Double wall B/C flute corrugated board – approx. 6mm thick
- Colour: Brown outer & brown inner
- Board grade: B/C flute double wall
- Multiscored: None
- Delivery format: Flat-packed
- For size guidance only this would replace the Kite Packaging codes: CDW440X340X140, CDW120906M, CDW101010, CDW121206, CDW121212M
Please note: Dimensions may vary slightly (±10–20mm) due to manufacturing tolerances. A sample service is available for testing prior to bulk orders. Branding/barcodes may appear on parts of the cardboard box. Images are for reference purposes only and there may be slight variances to the product supplied.
Fast UK Delivery
Fast UK Delivery
All of our products are manufactured and dispatched right here in our own UK warehouse, which means we can offer some of the fastest turnaround times in the country. And because everything is produced in the UK (unlike many other providers), you’ll never have to worry about customs delays or surprise charges. Delivery is calculated at checkout based on order value - free over £100, from £6.95 under that or select Next Day delivery upgrade for only £9.95. All orders are shipped flat-packed for maximum efficiency.
Product Reviews
Product Reviews
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Frequently Asked Questions
What sizes are available and which Royal Mail PiP band do they fall into?
These double wall boxes are available in six sizes, from 229 x 229 x 229mm up to 440 x 340 x 140mm. Depending on size, they fall into either the Royal Mail Pricing in Proportion Small Parcel band (up to 450 x 350 x 160mm) or the Medium Parcel band (up to 610 x 460 x 460mm), as listed in the size guide.
What makes double wall boxes stronger than single wall boxes?
These boxes are made from B/C flute double wall corrugated board, approximately 6mm thick, giving two layers of fluting for greater resistance to crushing and punctures than a single wall box.
What items are these boxes best suited to?
The extra strength makes these boxes a good choice for heavier items, fragile shipments, warehouse packing benches and even removals, where dependable stacking strength is important.
Do the boxes arrive assembled or flat-packed?
All sizes are delivered flat-packed to save storage space and can be folded into shape and sealed with tape quickly when needed.
How should I seal the boxes for transit?
We recommend sealing with quality packaging tape to ensure a secure close during transit, especially given the heavier loads these boxes are designed to carry.
How quickly will my order be despatched?
Orders are despatched the same working day when placed before our daily cut-off, with trade pricing that falls the more you buy and free UK delivery on orders over 100 pounds.
Why Choose Us
Free UK Delivery Available
Choose from a few delivery options including FREE delivery to mainland UK on orders over £100.
Trusted Supplier
Over 20 years’ experience in the postal industry under Mailcoms Ltd.
UK Based
All products are printed and made in the heart of England, keeping our carbon footprint as low as possible.

