Custom Large Cardboard Boxes for Bulky Items and Moves

What is a large cardboard box?

Most people call a box large once its longest side passes about 450 mm. At that point it stops being a parcel you carry under one arm. It becomes something you lift with both hands, often with hand holes cut into the ends.

Almost every large box we make is a regular slotted carton. That is the classic shape with four flaps on top and four on the base, closed with tape. It is simple, quick to build and strong for its weight.

The photos show typical uses. There are moving boxes with room labels and cartons with a large brand word on the side. Others are plain kraft with a single printed strip.

Who needs large boxes made to size?

Removal firms, storage businesses and anyone moving home are the obvious buyers. Online sellers of bulky goods are another big group, from bedding and cushions to lighting and pet beds. Trade suppliers use large cartons to send several smaller boxes in one shipment.

A made-to-size box matters more as boxes grow. A generic large carton that is 100 mm too tall wastes a lot of space in a van or on a pallet. For parcels that go through couriers, see our shipping boxes built for courier networks as well.

Single wall or double wall for a big box?

Wall choice is the most important decision on a large box. Big panels flex more than small ones, so the board has more work to do. Here is a simple way to decide.

Which large box size should I choose for a move?

For house moves, a mix of sizes works better than one big box. Heavy items should go in the smaller cartons so each one stays easy to lift. Light, bulky things such as duvets or lampshades go in the biggest ones.

A useful rule is this: if you struggle to lift a packed box, it is too big for what is inside it. Split heavy items across more boxes rather than adding a stronger board. Our guide to UK cardboard box sizes lists common moving sizes in millimetres. Label each box with its room and a short contents list as you go, and unpacking at the other end becomes far quicker.

How do I pack a large box so it survives the journey?

Large boxes fail at the base more than anywhere else. Tape the bottom flaps with an H pattern: one strip along the seam and one across each short edge. Do the same on the top once the box is full.

Keep the box full but not bulging. An underfilled box collapses when something is stacked on it. An overfilled one pushes the flaps open. Fill gaps with paper or soft items so the load does not shift. Before sealing, give the box a gentle shake. If you hear movement, add more filler until it goes quiet.

Are large boxes good for long-term storage?

They can be, if you choose the board and size with storage in mind. Boxes in a loft, garage or unit often sit under others for months. Double wall board keeps its shape far better under that steady weight.

Keep storage boxes to a few standard sizes so they stack in neat columns. Mixed sizes leave overhangs, and an overhanging edge is where boxes start to crush. A printed contents panel on the short end lets you read the box without pulling it out.

Keep cartons off bare concrete floors, which can hold damp. A pallet or a shelf a few centimetres up makes a real difference over a long winter.

What are common mistakes with large boxes?

The first is putting heavy things in very big boxes. A large carton full of books is hard to lift and puts strain on the base. Use a smaller box for dense items.

The second is choosing single wall for a box that will sit at the bottom of a stack. Pick double wall in that case. The third is forgetting how the boxes will be stored before use. Large flat-packed bundles still need a dry place with enough floor space.

Where do large boxes get delivered?

We ship large carton orders free to any UK address. They come flat and strapped in bundles, which makes them much easier to carry in than built boxes.

Open one bundle first and build a test box. If something is not right, such as a wrong size or transit damage, tell us within 10 days and include photos. We will reprint the cartons or refund the order.