large postage box

A large postage box is a generously sized cardboard box used to post bulky, heavy or multi item orders that will not fit a standard postal box. Choosing one well means matching the internal size to the contents, picking a board grade that can carry the weight and staying aware of Royal Mail parcel bands. Custom Postal Boxes manufactures large printed and plain shipping boxes in Wolverhampton for UK businesses that post bigger orders regularly.

When you need a large postage box

Orders grow beyond standard postal sizes quickly. Footwear in its retail box, small appliances, board games, gift hampers, tools and bundles of clothing all need more room than a letterbox or small parcel format allows. A large box also suits consolidated orders, where several items travel together and need separating so they do not damage each other in transit.

Room alone is not enough. A box that is far larger than the contents wastes filling material, allows movement and can look careless on arrival. Start from the largest item, arrange the contents as they will travel and then choose the smallest large box that holds that arrangement with space for protective material at the sides and top. Our cardboard shipping boxes are a practical starting point for most bulky orders.

Board strength for a large postage box

Board choice should follow weight and fragility, not size alone. Single wall corrugated board suits lighter bulky goods such as clothing and soft furnishings. Double wall board resists crushing and stacking pressure, which matters for heavier items and for parcels that will be stacked in a courier vehicle. Corners and edges take most knocks in transit, so firm board and well taped seams matter more as box size rises.

Matching box size to Royal Mail parcel bands

Royal Mail small parcels allow up to 450mm by 350mm by 160mm and 2kg on standard services, while medium parcels allow up to 610mm by 460mm by 460mm and up to 20kg. Many large orders sit in the medium parcel band, so a box sized just inside that limit can be more economical than one that drifts over it. Check the current bands on the Royal Mail services and size guidance before fixing a box size for regular use.

Packing heavy items safely in a large box

Place the heaviest item at the base, fill gaps so nothing can shift and add a layer of cushioning above the contents before closing the lid. Tape along the centre seam and the edges of the flaps, and consider strapping tape for very heavy loads. Marking the parcel with the delivery address inside the box as well as outside helps if the outer label is damaged.

Custom large boxes, print and ordering

For repeated bulky orders, a custom size removes wasted space on every parcel and a printed finish turns a plain carton into clear branding. Our range includes heavy duty shipping boxes and double wall shipping boxes for loads that need extra strength, alongside lighter options for bulky but light goods.

Custom Postal Boxes offers low minimum order quantities, free design support and free UK delivery, with boxes manufactured in house. Pricing depends on size, material and quantity, so request a quote through our contact page with your internal dimensions, the typical packed weight and how the boxes will be used.

FAQs about large postage box

What size counts as a large postage box?

There is no single official size with that name. In practice it means a box above small parcel dimensions, often sized for the Royal Mail medium parcel band of up to 610mm by 460mm by 460mm. Choose by internal measurements and packed weight rather than by the label.

Should I choose single wall or double wall board?

Choose single wall board for lighter bulky goods such as clothing. Choose double wall board for heavier, fragile or stackable loads, because the extra layer resists crushing and keeps corners firm through courier handling and vehicle stacking.

How much empty space should a large box have?

Allow enough room for protective material around the contents, especially at the corners and top, but avoid large voids. Contents that can move will gather momentum in transit, so fill gaps firmly with paper or other suitable material.

Can a large postage box be printed with my branding?

Yes. Large shipping boxes can be printed with logos, handling notes and returns information. Pricing depends on size, material and quantity, and Custom Postal Boxes provides free design support and free UK delivery on orders made to your specification.