custom large shipping boxes

custom large shipping boxes are shipping boxes made to the dimensions of bulky, long or multi item orders rather than the nearest stock carton. Custom Postal Boxes manufactures custom large shipping boxes in Wolverhampton in single wall and double wall corrugated board, with low minimum order quantities, free design support and free UK delivery through a quote based service.

When custom large shipping boxes beat stock cartons

Stock cartons force compromise at larger sizes. A box that is too tall wastes board and fill, lets contents slide and can push a parcel into a higher courier band, while a box that is too small tempts packers to force lids down and weaken the structure. A custom size removes both problems by matching the longest item, the stacking pattern inside and the way the order will be handled.

Large formats overlap with double wall shipping boxes for heavier loads and heavy duty shipping boxes where stacking strength matters. Choosing between them starts with weight and journey, not with the headline size alone.

Board strength for custom large shipping boxes

As a box grows, its panels flex more, so board grade matters more on a large box than on a small one. Single wall corrugated board suits lighter bulky goods such as bedding, clothing bundles and plastic products. Double wall board adds a second fluted layer for weight, stacking in storage and longer courier journeys where parcels are handled many times.

Flute, liners and edge strength

The fluted layer gives corrugated board its cushioning and its resistance to crushing at the edges, which is where stacking loads travel. Stronger outer liners resist scuffs and tape tearing, and matter when boxes are reused for returns. Tell your supplier the total packed weight and whether boxes will be stacked, so the grade is chosen for the real load.

Reinforcing the base and corners

On large boxes the base carries the load and the corners carry the stack, so packing should support both. Place the heaviest item at the bottom centre, fill side gaps so contents cannot lean into a corner and tape the base seam fully. If contents are dense, an inner divider or a second layer of board in the base spreads the weight.

Sizing, couriers and packing large orders

Measure the packed product, not the product alone, allowing room for protection at the ends and sides. For Royal Mail services the medium parcel limit is 61 cm by 46 cm by 46 cm and 20 kg, as shown in the Royal Mail size information for tracked services, and anything larger normally travels by courier, where volumetric weight can apply. A custom size that trims a few centimetres of empty height can therefore change the carriage cost of every order.

Packing methods that protect bulky goods

Wrap fragile parts separately, brace long items so they cannot bend across the box diagonal and keep sharp edges away from the board with pads or folded card. Fill remaining space firmly enough that contents cannot build momentum when the box is set down. A packed box should feel solid, with no sliding sound when it is tilted.

Getting a quote for custom large shipping boxes

Send your internal dimensions, packed weight and quantity through the contact page for a quote and the team will price the size, material and quantity you need. You can also review custom shipping boxes and cardboard shipping boxes for standard routes, plus the tag page for Royal Mail small parcel boxes when smaller orders need band specific sizing.

FAQs about custom large shipping boxes

What board should custom large shipping boxes use?

Single wall board suits lighter bulky goods, while double wall board suits heavier loads, stacking and longer journeys. Share the packed weight and stacking plans so the grade matches the job.

How do I measure for a large shipping box?

Measure the product as it will sit when packed, including any wrapping, then add clearance for protection at the ends and sides. Give internal box dimensions when you request a quote.

Can large shipping boxes be printed?

Yes. Logos, handling marks and brand colours can be printed on large shipping boxes. Keep handling information clear of tape lines and address labels so it stays readable in transit.

Will a custom size reduce my carriage costs?

It can. Removing empty height and width can keep a parcel in a lower courier band and reduce the amount of fill you buy and store. The saving depends on your carrier and your order profile.