Strong Recycled Single Wall Cardboard Packing & Shipping Box – 6×4×4″ (152.4×101.6×101.6 mm, Eco-Friendly Postal Box UK)
Strong Recycled Single Wall Cardboard Packing & Shipping Box – 6×4×4″ (152.4×101.6×101.6 mm, Eco-Friendly Postal Box UK)
Strong Recycled Single Wall Cardboard Packing & Shipping Box – 6×4×4″ with precise internal dimensions of 152.4×101.6×101.6 mm. Made from 100% recycled B-Flute corrugated cardboard (450TL2TCSF), this box offers excellent strength, fast assembly and reliable postal performance for UK e-commerce orders, Royal Mail shipments and courier despatch.
Size Guidance
The internal size is 152.4×101.6×101.6 mm (6×4×4″). Multi-score lines let you reduce the height for better fit and presentation. If you need a little more space, consider stepping up to our Strong Single Wall Cardboard Box 9×6×4″ or, for extra depth and capacity, the Strong Single Wall Cardboard Box 9×6×6″.
Key Features
- Internal size: 6×4×4″ (152.4×101.6×101.6 mm)
- Material: 100% recycled corrugated cardboard
- Wall Type: Strong Single Wall – B Flute
- Board Grade: 450TL2TCSF (premium strength)
- Eco: Fully recyclable, biodegradable and compostable
- Finish: Kraft brown inside and out
- Multi-scored: Reduce height to suit your product
- Supplied flat-packed: quick to assemble with tape
- Carries light–medium items with clean presentation
Technical Specifications
| Internal Dimensions | 152.4 × 101.6 × 101.6 mm (6 × 4 × 4″) |
| Board Grade | 450TL2TCSF |
| Flute Type | B Flute |
| Material | 100% Recycled Corrugated Cardboard |
| Sustainability | Recyclable, Biodegradable, Compostable |
| Colour | Kraft Brown |
| Multi-Score | Yes – height adjustable |
| Supplied | Flat-packed |
| Recommended Storage | 13–21 °C (55.4–69.8 °F) |
| Typical Use | E-commerce, shipping, postal despatch |
Applications & Uses
- Shopify, Amazon, eBay & Etsy product despatch
- Royal Mail Small Parcel shipments
- Cosmetics, skincare, handmade & craft items
- Cables, components, tech accessories & samples
- Subscription boxes & small merchandise
- Warehouse picking & returns processing
Courier & Postal Guidance
This size ships well with Royal Mail, DPD, Evri, Yodel, UPS and DHL. Always measure the final packed item including protective wrap to ensure compliance with Royal Mail size limits.
Useful courier size guides:
- Royal Mail – Size & Weight Guide
- Evri – Parcel Size & Weight Guide
- Yodel – Parcel Size Guide
- DHL – Size & Price Guide
- UPS – Dimensions & Weight Guide
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DPD’s standard UK service allows parcels up to 30 kg, 100 cm in length, and 230 cm in girth. Limits vary by service: Drop Off allows up to 20 kg and 60 cm length, while ExpressPak accepts up to 5 kg, with an 82 cm girth and 52 cm length. All parcels must be packed in a strong cardboard box, not a plastic bag, with sharp edges covered.
DPD’s size guidance is currently unavailable on their site, but their standard services accept parcels within common
Size Guidance
The internal size is 152.4×101.6×101.6 mm. Multi-score lines let you reduce the height for better fit and presentation. Leave room for protective materials such as paper void fill, foam wrap or bubble wrap when needed.
Box Strength & Weight Capacity
This strong single wall box is suitable for light to medium-weight items. For goods above 2–3 kg or fragile contents, consider our double wall boxes for extra crush resistance and stacking strength.
Sustainability & Environmental Benefits
Made from 100% recycled fibres, this box is fully recyclable, biodegradable and compostable. It contains no plastic coating and supports businesses aiming for eco-friendly packaging with lower environmental impact.
Packing Best Practices
For best results, place heavier items at the bottom and use paper void fill to prevent movement. Avoid overfilling as this can stress the flaps. For delicate products, wrap items individually before placing them inside the box.
Popular with Small Businesses
This box is widely used by sellers in cosmetics, candles, electronics, handmade crafts, jewellery, supplements, tech accessories and subscription services. Ideal for repeat-use packaging workflows in fast-paced e-commerce environments.
Fit Testing
If you are unsure about sizing or strength, we can provide samples for testing before placing a larger order.
Multi-Buy Pricing (inc VAT)
| Pack Size | Total Price | Per Box |
|---|---|---|
| 25 Boxes | £7.99 | £0.32 |
| 50 Boxes | £14.49 | £0.29 |
| 75 Boxes | £20.49 | £0.27 |
| 100 Boxes | £25.99 | £0.26 |
| 200 Boxes | £46.99 | £0.23 |
Bulk and pallet pricing available on request.
Trade & Wholesale Supply
- Volume discounts for 25–200 packs
- POs accepted; VAT invoices available
- Samples available for testing
Quotes & samples: WhatsApp +44 7450 981838 or info@mrbags.co.uk
Delivery & Despatch
- Same-day despatch before 5 pm (Mon–Fri)
- Royal Mail Tracked for smaller consignments
- DPD Next Day & DPD Saturday delivery available
- Tracking provided automatically via email/SMS
Customer Service & Support
- WhatsApp: +44 7450 981838
- Email: info@mrbags.co.uk
- Click & Collect: 10A Locket Street, Manchester, M8 8EE
- Opening hours: Mon–Fri 10:00–19:00 | Sun 11:00–18:00
Recommended Packaging Supplies
For best performance, secure the flaps using a strong adhesive tape. Single wall boxes benefit from reliable sealing when shipping through Royal Mail and couriers.
- Clear Packaging Tape – high-tack everyday use
- Brown Packaging Tape – strong, discreet & professional
- Fragile Tape – reduces courier damage
- Thermal Labels – ideal for shipping operations
You can also pair this with mailing bags for returns or extra weather protection.
Related Packaging
- All Cardboard Boxes
- One size up: 9×6×4″ • 9×6×6″
- Crash Lock Boxes
- Mailing Bags
- Thermal Labels
- Packaging Tape
- Royal Mail sizes: 8×6×2.5″ • 13×8×3″
Recycling & Environmental Guidance
Our boxes can be placed directly into standard household or business recycling streams. See Recycle Now for UK-specific information on cardboard recycling.
For businesses working towards sustainable packaging, WRAP UK provides guidance on waste reduction, eco-friendly packaging choices and responsible materials.
Are the 6×4×4″ box dimensions internal or external?
The measurements are internal. This box is exactly 152.4×101.6×101.6 mm (6×4×4″) on the inside, so always measure your product plus any protective wrapping against these internal dimensions.
Are these cardboard boxes recyclable, biodegradable and compostable?
Yes. They are made from 100% recycled corrugated cardboard and are fully recyclable, biodegradable and compostable through standard UK cardboard recycling streams.
What board and flute type do you use for this box?
This box is produced from premium single wall B Flute board with a 450TL2TCSF grade. It offers a good balance of strength and light weight for everyday e-commerce and postal despatch.
What weight can this single wall box safely hold?
It is suitable for light to medium-weight items when packed correctly. For heavier or very fragile goods, we recommend using extra protective packaging or switching to a double wall box for added strength.
Is this 6×4×4″ box suitable for Royal Mail Small Parcel?
Yes, many items packed in this size will fit within Royal Mail Small Parcel limits. Always recheck the final packed size and weight once you have added protective wrap or void fill.
What is this box commonly used for?
This size is popular with small businesses sending cosmetics, candles, handmade items, tech accessories, small electronics, samples and subscription products via Shopify, Etsy, Amazon and eBay.
How should I pack items inside this box for safe shipping?
Place heavier items at the bottom, wrap products where needed and use paper void fill or bubble wrap to stop movement. Do not overfill the box, as this can stress the flaps and affect courier handling, especially for fragile items.
What tape should I use to seal these boxes?
Use a good quality packaging tape across the base and top flaps. We recommend our Clear Packaging Tape or Brown Packaging Tape for everyday use, and Fragile Tape where extra care is required in transit.
What pack sizes are available and do you offer trade discounts?
These boxes are available in packs of 25, 50, 75, 100 and 200. Multi-buy discounts apply, and trade or pallet pricing is available on request for regular users and warehouses.
Can I get samples or a trade quote before ordering?
Yes. We can provide samples for fit testing and offer trade quotes for higher volumes. Please contact us via WhatsApp or email info@mrbags.co.uk with your requirements.
Royal Mail 24 Tracked
Dispatched same day if ordered before 5 pm Monday to Friday. Please allow up to 1-2 days for delivery.
£1.99
DPD Next Day
Dispatched same day if ordered before 3 pm Monday to Thursday. Not available to Scottish Highlands & Islands.
£4.99
Free on orders over £100