Strong Recycled Single Wall Cardboard Packing & Shipping Box – 12×9×3″ (304.8×228.6×76.2 mm, Eco-Friendly Postal Box UK)
Strong Recycled Single Wall Cardboard Packing & Shipping Box – 12×9×3″ (304.8×228.6×76.2 mm, Eco-Friendly Postal Box UK)
This strong 12×9×3 inch single wall cardboard box is designed for items that are wide but shallow, offering secure protection without adding unnecessary parcel depth. It’s a popular choice for books, printed materials, photo albums, fashion accessories, gift sets, textiles and smaller e-commerce orders that need a reliable, professional-looking carton. Made from 100% recycled cardboard, it delivers a solid balance of strength, durability and sustainability, making it suitable for everyday fulfilment, small businesses, online sellers and boutique brands. The clean brown kraft finish presents well for retail deliveries, while the efficient shape helps reduce postage costs across Royal Mail, DPD, Evri and Yodel services.
Why Choose This 12×9×3″ Box?
- Shallow, wide layout ideal for books, documents, clothing, accessories and craft items.
- Made from 100% recycled cardboard with a clean, professional kraft finish.
- Lightweight and postal-efficient, helping reduce shipping costs.
- B-Flute construction provides reliable protection for everyday fulfilment.
- Arrives flat-packed for easy storage and quick assembly.
- Consistent quality suitable for retail, boutiques and online sellers.
Multi-Buy Pricing (inc VAT)
| Pack Size | Total Price | Per Box |
|---|---|---|
| 25 Boxes | £11.99 | £0.48 |
| 50 Boxes | £20.99 | £0.42 |
| 75 Boxes | £30.49 | £0.41 |
| 100 Boxes | £39.49 | £0.39 |
| 200 Boxes | £76.99 | £0.38 |
Bulk and pallet pricing available on request.
What Fits Inside a 12×9×3″ Box?
This slim, wide format is ideal for flat or low-height items, offering professional presentation and efficient packing:
- Books, notebooks and planners
- Clothing items like t-shirts and accessories
- Craft materials, kits and handmade products
- Printed items, catalogues and documents
- Beauty products, gift bundles and small retail orders
How to Pack This Box Effectively
- Place items flat, keeping fragile goods centred in the box.
- Add kraft paper, bubble wrap or tissue around delicate items.
- Seal the base firmly using a strong H-pattern with quality tape.
- Keep the contents evenly distributed to prevent bending.
- For bundles, wrap items individually to avoid marking or rubbing.
Size Guidance
This 12×9×3″ box is ideal when you need wide coverage but minimal height. A smart choice for thin products that do not require a deep carton.
- Next size up in depth: 12×9×6″ Box
- Explore more options in our full cardboard box collection.
Box Strength & Weight Capacity
Rated for approx. 2–3 kg when sealed correctly. Suitable for everyday e-commerce items, printed products, textiles, cosmetics and similar goods. For heavier products, consider a double wall option.
Courier & Postal Guidance
This size performs well with Royal Mail, DPD, Evri, Yodel, UPS and DHL. Always check final packed dimensions, including void fill.
Useful courier size guides:
- Royal Mail – Size & Weight Guide
- Evri – Parcel Size Guide
- Yodel – Parcel Size Guide
- DHL – Size & Price Guide
- UPS – Dimensions Guide
DPD’s size guidance page is currently unavailable.
Sustainability & Environmental Benefits
Made from 100% recycled cardboard, this box is fully recyclable, biodegradable and compostable. No plastics or coatings are used.
Recycle Now – Cardboard Recycling | WRAP UK – Packaging Sustainability
Packing Best Practices
- Avoid overfilling; shallow boxes pack best when contents lie flat.
- Use padding to avoid movement during courier handling.
- Seal all seams with strong tape for good structural stability.
Fit Testing
Samples are available if you wish to test fit for your products before ordering larger quantities.
Trade & Wholesale Supply
Perfect for retailers, e-commerce brands, makers, fulfilment teams and subscription businesses. Trade rates and pallet quantities available.
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
Delivery & Despatch
- Same-day despatch before 5 pm (Mon–Fri).
- Royal Mail Tracked for smaller parcels.
- DPD Next Day and DPD Saturday available.
Recommended Packaging Supplies
Related Packaging
- All cardboard boxes
- Next size up: 12×9×6″
| Material | 100% Recycled Corrugated Cardboard |
| Size | 12x6x6 Inch (305x152x152 mm) |
| Color | Brown Kraft |
| Assembly | Flat-packed; Seal With Packing Tape |
| Board Grade | 450TL2TCSF |
| Eco-Friendly | Fully Recyclable Biodegradable and Compostable |
| Flute | B Flute |
| Internal Dimensions (inch) | 12 × 6 × 6 |
| Internal Dimensions (mm) | 304.8 × 152.4 × 152.4 |
| Max Recommended Weight | Approx. 3–4 kg When Packed Correctly |
| Recommended Storage Temperature | 13–21°C For Best Performance |
| Sustainability | Fully Recyclable |
What can I pack in a 12×9×3 inch cardboard box?
Is the 12×9×3 box strong enough for shipping?
Is this box suitable for Royal Mail and other UK couriers?
Are these boxes recyclable?
Do the boxes arrive flat-packed?
Is this a good size for clothing or t-shirts?
Can I order samples before buying?
Is this box suitable for craft and handmade items?
Do you offer trade or bulk pricing?
How should I pack fragile items in this box?
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