Heavy-Duty Strong Single Wall Cardboard Box 12×12×12″ (304.8×304.8×304.8 mm) – Recycled, Rigid & Reliable Packing Box UK
Heavy-Duty Strong Single Wall Cardboard Box 12×12×12″ (304.8×304.8×304.8 mm) – Recycled, Rigid & Reliable Packing Box UK
This 12×12×12″ heavy-duty single wall cardboard box is a strong, reliable and versatile cube ideal for larger items that need balanced protection on all sides. Made from upgraded recycled board, it provides near double wall performance while staying light enough for cost-effective shipping. A trusted choice for e-commerce sellers, subscription brands and warehouses needing a clean, rigid and eco-friendly cube box for daily packing.
A Strong, Everyday Cube Box for Larger Items
Many cube boxes collapse or lose shape under pressure, especially in courier handling. This upgraded heavy-duty board solves that problem. It offers excellent crush resistance, firm edges and a stable structure that protects your products throughout transit.
- Stronger than standard single wall – near double wall feel
- Perfect cube shape for even internal protection
- Rigid design stops bowing and corner crushing
- Lightweight for competitive courier rates
- 100% recycled and fully recyclable
What This 12×12×12″ Box Is Commonly Used For
This large cube size is widely used for:
- Bulk clothing orders, jumpers, hoodies and textiles
- Large gift sets and curated product bundles
- Homeware, kitchen accessories and boxed goods
- Candles, diffusers and home fragrance multipacks
- Craft materials, hobby supplies and larger kits
- Electronics accessories and boxed products
- Subscription boxes and seasonal hampers
Measurements & Internal Size
Internal size: 12×12×12″ (304.8×304.8×304.8 mm).
All dimensions are internal to help you measure product fit accurately.
Nearby Sizes & Alternatives
If you want a slightly larger cube:
If you need something smaller but strong:
If you prefer a lower-cost standard single wall option:
Heavy-Duty vs Standard Single Wall
| Feature | Heavy-Duty 12×12×12″ | Standard Single Wall |
|---|---|---|
| Strength | Upgraded board – near double wall performance | Everyday light use |
| Best For | Clothing, homeware, kits, larger orders | Light items, low-value goods |
| Weight Capacity | Typically 7–9 kg | 3–4 kg |
| Durability | High crush resistance and firmer edges | Basic protection |
Box Strength & Capacity
This box uses a heavier B-Flute board chosen for improved rigidity. When padded well and sealed with strong tape, it typically handles loads around 7–9 kg, depending on the contents and courier.
How to Pack This Box Effectively
- Wrap fragile goods with kraft paper or bubble
- Place heavy items centrally to avoid side pressure
- Use void fill to stop movement during transit
- Seal with strong tape – H-pattern is recommended for heavier loads
Sustainability & Environmental Benefits
This box is made from 100% recycled cardboard and is fully recyclable, biodegradable and compostable. It contains no plastic or mixed materials, making it suitable for all UK kerbside recycling collections.
Multi-Buy Pricing (inc VAT)
| Pack Size | Total Price | Per Box |
|---|---|---|
| 15 Boxes | £23.99 | £1.59 |
| 30 Boxes | £43.99 | £1.47 |
| 60 Boxes | £83.99 | £1.40 |
| 120 Boxes | £157.99 | £1.31 |
Trade and pallet pricing available – ideal for regular shippers and fulfilment centres.
Courier Compatibility
This 12×12×12″ cube box works well with Royal Mail, Evri, Yodel, DPD, UPS and DHL. Its shape stacks neatly on pallets and conveyor systems, helping reduce transit damage.
Useful Courier Size Guides
- Royal Mail – Size Guide
- Evri – Size Guide
- Yodel – Size Guide
- DPD UK Parcel Guidance
- UPS Dimensions & Weight
Related Boxes & Collections
- 14×14×14″ Heavy-Duty Box
- 10×10×10″ Heavy-Duty Box
- 12×9×9″ Standard Box
- All Cardboard Boxes
- Single Wall Boxes
- Small Cardboard Boxes
Why Buy from Us?
We supply packaging to thousands of UK sellers, fulfilment centres and subscription brands. Our heavy-duty single wall boxes are chosen for consistent strength, clean presentation, reliable performance and fair pricing. With fast despatch and friendly support, we help keep your packing simple and stress-free.
Delivery & Despatch
- Same-day despatch before 5 pm (Mon–Fri)
- Royal Mail Tracked for smaller orders
- DPD Next Day available
- DPD Saturday delivery on request
Need Advice?
If you are unsure whether this 12×12×12″ box is the right fit, our team can help you compare nearby sizes and alternatives.
- WhatsApp: +44 7450 981838
- 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
| Material | 100% Recycled Corrugated Cardboard |
| Size | 12x12x12 Inch (305x305x305 mm) |
| Color | Brown Kraft |
| Assembly | Supplies flat-packed (Sealed with Packing Tape) |
| Eco-Friendly | Fully Recyclable Biodegradable and Compostable |
| Flute Type | B Flute |
| Recommended Storage | Store in a dry environment at 13–21°C for best performance |
| Shape | Cube |
| Strength | Heavy-Duty Single Wall (Near Double Wall Performance) |
| Weight Capacity | Typically up to 7-9 kg when packed correctly |
What can I pack in a 12x12x12 inch cardboard box?
This large cube size is ideal for clothing bundles, homeware, gift sets, craft materials, electronics accessories and subscription boxes.
Is this 12x12x12 box stronger than standard single wall?
Yes. It uses an upgraded heavy-duty single wall board that offers near double wall performance.
Are the 12x12x12 measurements internal?
Yes. All measurements are internal so you know the exact usable space inside the box.
How much weight can this cube box hold?
When packed correctly with proper padding, this heavy-duty cube box typically handles loads around 7–9 kg.
Is this box eco-friendly?
Yes. It is made from 100% recycled cardboard and is fully recyclable, biodegradable and compostable.
Does the box arrive flat-packed?
Yes. All boxes are supplied flat-packed for easy storage and quick assembly.
Is this box suitable for couriers?
Yes. It works well with Royal Mail, DPD, Evri, UPS, DHL and Yodel. Always check final packed weight.
Do you offer bulk or trade pricing?
Yes. Multi-buy discounts are listed and pallet pricing is available for trade and fulfilment centres.
Can I order a sample?
Yes. Samples can be arranged so you can test fit and strength before ordering in bulk.
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