shipping box

A shipping box is a sturdy cardboard box made to carry a product through posting or courier delivery, protecting it from knocks, stacking pressure and handling on its journey to the customer. The term is a general one, and it covers everything from a small single wall carton for a light order to a large double wall box for a heavy or fragile shipment. Choosing well means matching the box to the item, rather than reaching for the nearest box on the shelf, because a box that is too large, too weak or poorly sealed can damage even a well made product.

Choosing a shipping box for your parcel

Start with the item itself: its length, width and height, its weight, and whether it is fragile, heavy, awkwardly shaped or valuable. Add a small allowance for cushioning at each side, and choose a box that holds the item snugly once that cushioning is in place. A snug box stops the contents from moving and striking the walls, while a box that is far too large needs a great deal of filling and still leaves room for movement. If you ship a mix of products, settle on a small range of sizes that covers most orders, rather than a different box for every single item.

Single wall, double wall and box styles

Single wall corrugated board, with one fluted layer between two liners, suits most everyday parcels, including clothing, books, cosmetics and small household items. Double wall board, with two fluted layers, gives greater stacking strength and crush resistance for heavier, fragile or high value parcels that may sit under other parcels in a cage or a van. The most common shipping box style is the regular slotted carton, with four flaps top and bottom that meet in the centre when folded, while mailer style boxes fold together more neatly and suit presentation as well as protection. Choose the style that matches both the journey and the impression you want on arrival.

How to measure for a shipping box

Measure the item at its longest, widest and tallest points, then add a small allowance for wrapping or cushioning, and compare the result with the internal measurements of the box. Internal measurements matter, because the board thickness itself takes up space, and a box described by its outside size may be smaller inside than you expect. Weigh the finished parcel complete, including cushioning and any invoice or gift card, and check it against your carrier size and weight limits before you print a label. A quick measurement at the packing bench prevents a parcel that is over size, over weight or poorly protected.

When a shipping box is better than a mailer or a bag

A shipping box is the right choice when the item has a shape that must be protected, when it could be crushed by other parcels, or when it needs cushioning on all sides. Ceramics, glass, electronics, gift sets and multi item orders all benefit from rigid walls and room for cushioning, while soft clothing or a flat document may travel well in a bag or a slim mailer. If the item could bend, dent, snap or leak, a box with a snug fit and proper cushioning will almost always give a better result than a flexible mailer that follows the shape of the item and offers little crush protection.

Packing a shipping box so it arrives safely

Good packing starts before the item goes into the box. Wrap a fragile item so every side is cushioned, place it centrally with the heaviest side down where that makes sense, and fill any remaining space so nothing can shift when the box is turned over. Pay particular attention to corners, because they take the first impact if a parcel is dropped, and a snug fit protects corners far better than extra filling in the middle of the box. Seal the box firmly along the centre seam and across the ends with strong packing tape, and make sure the address label sits flat on the largest face, away from seams and edges.

Cushioning, void fill and fragile items

Cushioning should protect the item without making the parcel unnecessarily large, because excess size can push a parcel into a larger posting band and waste material. Paper void fill, corrugated wrap and paper fitments all work well for most items, and the choice depends on the fragility of the product and the space left in the box. For a very fragile item, use a double boxing method: pack the item in a snug inner box with cushioning, then place that inner box inside a larger shipping box with cushioning around it. That extra layer absorbs shocks that a single box alone might pass on to the contents.

Labelling a shipping box clearly

Print or write the address clearly, include the full postcode, and add a return address so the parcel can come back if delivery fails. Leave a clear area for the label, keep it away from seams, tape edges and bold print that could confuse scanning, and remove any old labels from a reused box. If the parcel contains a fragile item, a simple handling note on the outside can help, but it does not replace proper cushioning inside, so never rely on a label alone to protect the contents.

Ordering a custom shipping box

A custom printed shipping box can carry a logo, a short message or simple handling guidance, which makes the parcel look professional and helps repeat customers recognise your brand. Keep the design clear, leave space for the address label, and choose a board colour that suits your print: kraft board gives a natural look with simple print, while white board gives a brighter surface for full colour artwork. Standard formats take 10 to 14 working days after final artwork approval, and corrugated formats take 12 to 15 working days, and these figures describe production time only and are not a guaranteed delivery date. Share the item sizes, typical parcel weights and board strength you need when you ask for a quote, so the box is made for your real orders.

Storing and reusing shipping boxes

Store flat packed shipping boxes in a dry place, away from damp and direct heat, stacked neatly so the board stays flat and the boxes fold cleanly when needed. A box that has warped in damp storage will not fold squarely and may seal poorly, which undermines protection. Reusing a shipping box is sensible when it is still strong, clean and undamaged, but retire any box with crushed corners, a split seam, a damp patch or a weakened flap, because a reused box that fails in transit costs far more than a new one.

The Royal Mail small parcel guide sets out current maximum size and weight limits for a small parcel, which is a useful check for finished parcels. For related packaging, see corrugated shipping boxes, book shipping boxes and boxes for shipping. You can request a quote, browse the shop and read the delivery information page for planning.

Frequently asked questions

What size shipping box do I need?

Measure the item with its cushioning included, and choose a box with internal measurements slightly larger than those figures. A snug fit protects the contents better than a large box filled with extra material.

Should I choose single wall or double wall board?

Single wall board suits most light to medium everyday parcels, while double wall board gives extra stacking strength for heavier, fragile or high value parcels. Choose the board that matches the weight and the journey.

Can a shipping box be printed with my branding?

Yes. Printed shipping boxes can carry a logo and a short message, provided you leave a clear, flat area for the address label away from seams and edges.

How should I pack a fragile item in a shipping box?

Wrap the item so every side is cushioned, place it centrally, fill the remaining space so it cannot move, and protect the corners. For very fragile items, use double boxing, with a cushioned inner box inside a larger shipping box.

How long does production take after artwork approval?

Standard formats take 10 to 14 working days and corrugated formats take 12 to 15 working days after final artwork approval. These figures describe production time only and are not a guaranteed delivery date.