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Small Cardboard Boxes
Small cardboard boxes are one of the most practical ways to keep postage costs down. The smaller and lighter your packed box, the lower your per-item shipping cost — particularly if you're sending via Royal Mail, where dimensions and weight determine exactly which price band you fall into.
Our range covers small single wall and double wall despatch boxes, small postal boxes, small mailing boxes, and self-erecting ColomPac options for faster packing. All supplied flat-packed to keep your storage requirements minimal, and all made from recycled and responsibly sourced corrugated cardboard.
Choosing the right small box
For everyday ecommerce despatch, small single wall boxes are the most cost-effective choice for lightweight products — cosmetics, accessories, small electronics, books, and similar items that don't need heavy-duty protection.
For fragile smaller items, a small double wall box gives you the extra crush resistance to handle a busy fulfilment network without adding much to your packaging cost.
For high-volume packing lines, ColomPac self-erecting boxes remove the need for tape on the base and assemble in seconds — a meaningful time saving when you're packing at scale.
For gifting, our gift boxes cover small presentation formats including magnetic boxes and lidded options where the unboxing experience matters.
Small boxes and Royal Mail sizing
Getting your box dimensions right pays off directly in postage costs. Royal Mail's small parcel threshold is 450mm × 350mm × 160mm — anything below that and you're in a lower price band than a medium parcel. Our Royal Mail size guide sets out all the thresholds so you can match your box to the right band before you buy.
For a full guide to box types, sizing, and what to look for when buying, see our complete guide to cardboard boxes. Or browse the full range if you need something larger.
