Smaller boxes mean more parcels and more handling. A large cube reduces both. Plus, double wall board handles weight far better. With Pack Printers, you get practical, dependable packaging:
In short, the right box saves you time and money. It also protects your stock and your reputation. So whether you ship daily or move office once, this size earns its place.
Here is a quick summary of the standard specification. However, we can adjust board grade and print to suit you.
| Specification | Detail | Why It Matters |
| Internal Size | 20″ x 20″ x 20″ (approx. 508mm cube) | Fits bulky, light-to-medium loads |
| Board Grade | Double wall corrugated | Two fluted layers resist crushing |
| Style | 0201 regular slotted carton (RSC) | Folds flat, tapes shut quickly |
| Capacity | Roughly 8,000 cubic inches | Excellent volume per box |
| Flat-Packed | Supplied flat in bundles | Saves storage space until needed |
| Material | Recyclable kraft corrugated | Widely recycled across the UK |
Please note that sizes are measured internally. Therefore, the external dimensions sit slightly larger. That matters when you calculate courier charges, so do check before booking.
Board grade makes a bigger difference than most people expect. Single wall has one fluted layer between two liners. Double wall packing boxes, on the other hand, have two fluted layers. So they resist crushing far better under weight. They also stack more safely on a pallet. Because a 20 inch cube can hold a lot, that extra strength is essential. Otherwise, the walls bow outward once the box is full.
Bulky items need space, but they also need support. Our large double wall boxes provide both. The tall walls hold their shape when packed properly. Meanwhile, the reinforced board absorbs knocks in transit. So fragile or oddly shaped goods stay protected. In addition, the flat, square shape stacks neatly in a van or warehouse. Therefore, you use your space more efficiently too.
This size is genuinely versatile. So a cardboard box double wall 20x20x20 suits many jobs. For example, it works well for house removals and storage. It also suits ecommerce sellers shipping bulky stock. Warehouses use it for consolidating smaller items too. Meanwhile, event and exhibition teams use it for kit transport. Whatever the job, the cube shape keeps packing simple.
Not every job needs the same specification. So our 20″x20″x20″ Double Wall Boxes come with options. Choose your board grade, print, and inserts to suit the load.
| Option / Add-On | Description | Best For |
| Single Wall | One fluted layer, lighter and cheaper. | Light, low-value contents |
| Double Wall | Two fluted layers for extra strength. | Heavy or fragile loads |
| Triple Wall | Maximum strength for very heavy items. | Industrial & export use |
| Custom Print | Your logo printed on the outer walls. | Branded shipping |
| Fragile / Handling Marks | Printed warnings for couriers. | Delicate contents |
| Card Inserts & Dividers | Fitted partitions inside the box. | Multi-item packing |
| Custom Sizing | Made-to-measure dimensions. | Reducing wasted space |
| Bulk Pallet Quantities | Larger runs at lower unit cost. | High-volume shippers |
Shipping regularly? Then buying in volume makes sense. Our Bulk 20x20x20 cardboard boxes bring your unit cost down significantly. You also avoid the risk of running out mid-campaign. Because boxes arrive flat-packed, storage stays manageable. In addition, we can deliver in staged batches if space is tight. So you get bulk pricing without a warehouse full of cardboard.
A stock cube works well for many loads. However, it is not always the perfect fit. If your product leaves too much empty space, you pay for air. So we also make custom boxes to your exact dimensions. A right-sized box uses less void fill and often costs less to post. Plus, we can print your branding on the outside. As a result, even your shipping cartons work as marketing.
Pack Printers is a UK packaging manufacturer with years of hands-on experience. We supply retailers, warehouses, and removal firms across the country. As a result, we understand shipping demands properly. For example, we know board grade must match the load weight. We also know courier handling is rarely gentle. So here is what sets us apart:
Finally, we quality-check every order before dispatch. After all, a failed box costs far more than the box itself.
Ready to order? Then let us get started. First, tell us your quantity and board grade. Next, mention your typical load weight, so we can advise properly. Our team will then prepare a tailored quote. We can also discuss custom sizes or printing if you need them.
Free Design Support
Free Custom Box Dieline
Free Shipping
