box for postage

A box for postage is a cardboard box sized and built to carry goods safely through the UK postal and courier networks, and Custom Postal Boxes makes custom printed options in Wolverhampton for UK businesses. A good box for postage matches the internal space to the product, keeps the packed weight inside the intended Royal Mail band and protects the contents without wasted space.

How to choose a box for postage for your product

Start with the product rather than with a favourite box size. Measure the longest, widest and tallest points of the item as it will sit in the pack, including any wrap or inner carton. Then choose internal dimensions a little larger on each side so the product slides in easily but cannot move far. A box that is too snug can split at the corners, while a box with too much empty space invites crushing.

Next, check the postal band you are aiming for before you settle the size. Royal Mail large letter allows up to 353mm by 250mm by 25mm and 750g, small parcel allows up to 450mm by 350mm by 160mm and 2kg, and medium parcel allows up to 610mm by 460mm by 460mm and 20kg. The Royal Mail size and weight guidance is worth reading before a production run, because a few millimetres of extra depth can move a packed order into a costlier band for every single parcel you send.

Internal size matters more than outside size

Board thickness and folded flaps mean the outside of a box is always a little larger than the space inside it. Quote and compare boxes on internal dimensions, and test a real product in a sample whenever the fit is tight. This matters most for flat goods such as books, prints and folded garments, where a letterbox postal box can be the difference between a delivery that lands on the mat and a parcel left with a neighbour.

Leave room for protection, not for air

fragile items need a small buffer of paper wrap or a fitted insert so shocks spread through the packing rather than through the product. Sturdy items with flat sides often need very little buffer at all. Planning that buffer into the internal size from the start gives a neat pack that uses less filler, weighs less and presents the product exactly where you want it when the lid opens.

Board, strength and styles of box for postage

Most postal boxes use corrugated cardboard because its fluted middle layer absorbs knocks while staying light. Single wall board suits lighter and less fragile orders and keeps postage weight down. Kraft board gives a natural brown finish that prints well with a bold logo, and white board gives cleaner colour for detailed artwork. Browse the cardboard postal boxes range to see how a straightforward postal format can still carry strong branding.

Styles worth considering for regular posting

A classic postal box with a tuck in lid is quick to pack and looks tidy on arrival. Deeper shipping styles suit bulkier orders, while slim large letter postal boxes suit A4 documents, catalogues and flat gifts. If you post the same products every week, one well judged size for your core range is usually better than many near sizes that slow packing and complicate stock keeping.

Packing and posting well, every time

Place the heaviest part of the product low in the box, fill gaps with scrunched paper so nothing rattles, and close the lid without forcing it. A bulging lid changes the external dimensions and can push the parcel into another band, so if the lid will not sit flat, move up a size. Put the address label on the largest flat face, away from seams and tape.

Custom Postal Boxes is a project of Vertex Packaging, manufactures in house and offers low minimum order quantities, free design support and free UK delivery. Pricing depends on size, material and quantity, so request a quote through the contact page with your product dimensions and quantity for a box specified for your goods.

FAQs about choosing a box for postage

These answers cover the questions UK sellers ask most often before they order postal packaging for regular dispatch.

What size box for postage do I need?

Measure your product at its widest points, add a small allowance for any wrap or insert, and choose internal box dimensions just above that figure. Then check the packed size and weight against the Royal Mail band you want to use.

Can a box for postage be printed with my logo?

Yes. Custom Postal Boxes prints postal and mailer boxes with your branding, and free design support helps you place artwork so it stays clear of folds, edges and the closing flap.

Is a cardboard box for postage recyclable?

Cardboard postal boxes can be recycled through normal household and workplace collections once tape and labels are removed where practical. Choosing the right size also reduces the amount of filler you need to add.

What is the difference between a postal box and a shipping box?

A postal box is usually a smaller format made for letter and parcel post, while a shipping box is generally larger and built for courier loads, stacking and heavier contents. Many products can use either, depending on weight and fragility.

How do I get a price for a box for postage?

Send your internal size, board preference, print requirements and approximate quantity through the contact page. Pricing depends on size, material and quantity, and you will receive a quote based on that specification.