postal cardboard boxes

Postal cardboard boxes are corrugated cardboard boxes designed to protect goods during posting and courier delivery. The corrugated structure gives the box strength and cushioning while keeping it light enough to handle, stack and store flat before use. They are used for everything from single posted orders to subscription parcels, because the board can be sized, printed and finished to suit the product inside.

How postal cardboard boxes are made

Corrugated board is made from a fluted sheet sandwiched between flat liner sheets. The flutes act like a series of small arches, which resist crushing and absorb shocks during transit. That structure is why a relatively light cardboard box can protect a much heavier product, and why it holds its shape when parcels are stacked.

Flute size affects the feel and the strength of the box. A finer flute gives a smoother surface that suits printing and a neat finish for posting. A larger flute gives more cushioning and is often chosen for heavier or more fragile goods. The right choice depends on the product weight, the distance it travels and how much presentation matters.

Single wall and double wall board

Single wall board has one fluted layer and suits light to medium parcels such as clothing, books, cosmetics and small household goods. It packs flat, assembles quickly and keeps the parcel light. Double wall board has two fluted layers and suits heavier parcels, fragile items and goods that may be stacked under other parcels in a van or warehouse.

Choosing double wall board for a light product adds weight and bulk that may not be needed. Choosing single wall board for a heavy product risks crushing and damage. Match the board to the product, and test a packed sample under a stack of similar parcels if stacking is a regular part of delivery.

Kraft and white board compared

Kraft board is brown, natural looking and practical for everyday posting. It hides scuffs well and suits a simple, honest brand style. White board is brighter, gives a cleaner look for premium products, and provides a better base for coloured print. Both are cardboard, and both are widely recyclable in the UK.

Sizes and styles of postal cardboard boxes

Postal cardboard boxes come in shallow mailer styles, deeper carton styles and letterbox friendly shapes that fit through a standard letterbox. Shallow mailers suit flat goods, while deeper cartons suit gift sets, multi item orders and taller products. If you also need branding, postal boxes with logo explain how logo printing works on postal board.

Some cardboard postal boxes use a crash lock base that pops into shape, which speeds up packing for high volume teams. Others use interlocking flaps that need no tape, which gives a tidy finish for posted orders. The best style depends on packing speed, product shape and whether the customer needs to reseal the box for a return.

Packing cardboard postal boxes well

Pack the heaviest item at the bottom, wrap fragile items separately, and fill gaps with paper void fill so nothing moves. Seal the box fully along the opening, and place the delivery label flat on the largest panel. A label that wraps around a corner can be hard to scan and may delay delivery.

Store flat packed cardboard boxes in a dry place, away from damp floors and direct heat. Damp board loses strength quickly, and a box that has softened in storage will not protect the product as well in transit, even if it looks normal from the outside.

Recycling and reuse after delivery

Customers can usually recycle cardboard postal boxes through kerbside recycling, after removing tape, labels and non paper inserts. Boxes in good condition can also be reused for storage or for returns, which extends their life before recycling. Clear recycling guidance printed inside the box can help customers dispose of it correctly.

Ordering postal cardboard boxes on a quote basis

Custom and printed postal cardboard boxes are supplied on a quote basis, so board type, size, print and quantity can be matched to the order. State the product dimensions and weight, the board you prefer, and whether you need print, and the quote can be based on that exact specification.

Corrugated boxes are normally produced in 12 to 15 working days after final artwork approval. These timings are planning guides, not a guaranteed delivery date. For a full overview of the range, visit the shop page, and for delivery details see the delivery information page.

Cardboard size and weight affect the posting category, so use the Royal Mail small parcel guide to confirm the limits that apply to your finished parcel.

Frequently asked questions

What is the difference between single wall and double wall cardboard?

Single wall board has one fluted layer and suits light to medium parcels. Double wall board has two fluted layers and gives extra crush resistance for heavier or fragile parcels and for parcels that will be stacked.

Are postal cardboard boxes strong enough for fragile items?

Yes, when the board and the internal packing are matched to the item. Use double wall board for heavier fragile goods, wrap each item separately, and fill all gaps so the contents cannot move during transit.

Can postal cardboard boxes be printed?

Yes. Cardboard boxes can be printed with a logo, a pattern or a full design, on white board for bright colour or on kraft board for a natural look. Artwork is proofed before production so the finished print can be checked in advance.

Do cardboard postal boxes arrive flat?

Most postal cardboard boxes are supplied flat packed, which saves storage space and keeps delivery of the packaging itself efficient. They assemble by folding along scored lines, and many styles lock into shape without tape.

Are postal cardboard boxes recyclable in the UK?

Cardboard is widely recyclable through UK kerbside collections. Remove tape and non paper inserts first, and flatten the box to save space in the recycling bin.