custom corrugated mailing boxes

custom corrugated mailing boxes are mailing boxes manufactured to the dimensions, board grade and print specification of one business rather than bought from a stock list. Building the box around the product means less void fill, less movement in transit and a parcel that sits comfortably inside the postage format you intend to use. Custom Postal Boxes makes custom corrugated mailing boxes in house in Wolverhampton, with low minimum order quantities, free design support and free UK delivery.

What custom corrugated mailing boxes give you that stock boxes cannot

Stock boxes are made for nobody in particular, so most products rattle inside them or force the packer to add filler to take up the slack. A custom box starts with your product, its weight and the way it will be packed, then sets the internal dimensions, board and closure around those facts. The result is a parcel that feels solid in the hand, stacks evenly on a pallet or in a courier cage, and presents your products in a fixed position every time it is opened.

How corrugated board protects the contents

Corrugated board is made from a fluted inner layer bonded between flat liner papers. The flutes act like a row of small arches, spreading impact loads and resisting crushing from above while adding very little weight. That combination of strength and lightness is why corrugated board remains the standard material for postal packaging, and why choosing the right flute profile matters more than simply choosing a thicker box.

Choosing a flute profile

E flute is slim and smooth, giving crisp print and a neat finish for lighter goods. B flute adds thickness and cushioning for general ecommerce orders. C flute offers still more padding for bulky items, and double wall board combines two fluted layers where loads are heavy or stacking pressure is high. Matching the flute to the product keeps protection where it is needed without paying for board you do not need.

Designing custom corrugated mailing boxes around the journey

A mailing box has to survive sorting machinery, conveyor drops, stacking in vehicles and a final stretch in a delivery bag or van. Designing for that journey means thinking about corner strength, how the lid closes, and whether the contents can shift. Fitments cut from card can lock bottles, jars or devices into position, while a snug internal fit removes the need for loose fill that customers then have to dispose of.

Postage formats and practical sizing

Size decisions have a direct effect on postage, because carriers price by format and weight together. The Royal Mail size and weight guide allows a Small Parcel up to 45cm by 35cm by 16cm and 2kg, and a Medium Parcel up to 61cm by 46cm by 46cm and 20kg. Keeping a custom box just inside a format boundary can save money on every single order, which is one of the strongest arguments for having the box made to measure. Compare styles in our corrugated mailer boxes and custom mailing boxes ranges.

Print options and ordering well

Corrugated mailing boxes can be printed on the outside, the inside, or both. A kraft liner gives a natural background that suits bold single colour work, while a white liner gives brighter colour for detailed artwork and photography led designs. Finishes such as matt or gloss coating help the outer face resist scuffs picked up in transit, keeping the branding readable when the parcel arrives. Our printed postal boxes show the effect on a finished pack.

• Send internal dimensions based on the packed product, not the product alone.
• State the total packed weight so the board grade can be specified correctly.
• Name the carrier and service you use most often.
• Ask for a plain sample and run your own postal test before the main run.

Pricing depends on dimensions, board, print coverage and quantity, so each specification is quoted individually. Free design support helps you prepare artwork that prints cleanly on corrugated board, where fine lines and small text behave differently than they do on smooth paper. Start with your product measurements on our contact page and the team will build a specification around them.

custom corrugated mailing boxes FAQs

Why have mailing boxes made to a custom size?

A custom size removes empty space inside the parcel, which reduces movement, damage and the amount of void fill you need to buy and your customers need to throw away. It can also keep the parcel inside a cheaper postage format.

Which corrugated board is best for mailing boxes?

It depends on weight and fragility. E flute suits lighter goods and fine print, B flute is a good all round choice for general orders, and double wall board is used where items are heavy or parcels are stacked under load.

Can corrugated mailing boxes be printed inside?

Yes. Interior print is popular for welcome messages, instructions and brand stories, because the inside of the lid is what the customer sees as the box opens. It should be planned at artwork stage so the design registers correctly.

Do custom mailing boxes arrive flat or assembled?

Mailing boxes are normally supplied flat, which saves storage space and delivery volume. They fold together by hand at the packing bench in seconds, and no tape or glue is needed for the basic structure on most styles.

What information do you need for a quote?

Internal dimensions, the packed weight, the quantity you need, your print requirements and the carrier you use. Photographs of the product as it will be packed are also helpful for judging inserts and protection.