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Single Wall Cardboard Boxes
Single wall cardboard boxes are the everyday workhorse of ecommerce and warehouse despatch. Made from a single layer of corrugated cardboard — a fluted inner layer between two flat outer sheets — they strike the right balance between protection, cost, and practicality for the vast majority of products up to around 10kg.
We stock one of the widest ranges of single wall box sizes available, so whether you're packing small cosmetics or larger retail items, there's a stock size that fits without overpaying for material you don't need.
Is single wall right for your product?
Single wall boxes are the right choice when your products are under 10kg, your courier or postal network handles parcels with reasonable care, and keeping per-unit packaging costs low is a priority. They're used across ecommerce, retail, and light industrial despatch every day — for good reason.
If your products are heavier, more fragile, or need to be stacked for storage or palletisation, double wall cardboard boxes offer the extra crush resistance and load-bearing strength to handle that.
Getting the size right
Box dimensions are always quoted as internal measurements — Length × Width × Depth — which is the usable space for your product. Allow 3–5cm of clearance on each side for any void fill or protective packaging. Too much empty space and contents shift in transit; too little and you risk seam failure under pressure.
If you're sending via Royal Mail, your packed dimensions also determine which postage band you fall into — worth checking before you commit to a size. Our Royal Mail size guide sets out the thresholds clearly.
For a full guide to cardboard box types, flute grades, and what to look for when buying in volume, see our complete guide to cardboard boxes. Or browse the full range if you need something beyond single wall.
