One carton size is easy to order and easy to recognise. It can also leave your packing team filling the same empty corners all day. At the other extreme, a separate carton for every product creates more stock to count, store and replenish.
The useful question is how many sizes your operation can justify. Start with the products you actually dispatch and the way you pack them. A practical carton range should work for the people buying the boxes, the people filling them and the shipment that leaves the factory.
Where should I start when choosing carton sizes?
With your dispatch records. Look at complete orders, not individual products.
A product catalogue tells you what you sell. Your dispatch records tell you what needs to fit in a carton.
Review a representative period that includes your regular orders. Identify common single products, frequent combinations and larger orders. Keep unusual or seasonal shipments separate so they do not distort the everyday range.
For each group, record the product dimensions, quantity per pack, packed weight and protective materials. Include bags, accessories, inserts and dividers. A box that fits the bare product may not fit the complete order.
How should I group products into carton sizes?
By how they need to be packed, not only by their size.
Two products with similar dimensions may need different packing arrangements. One may tolerate contact with another item. The other may need separation around a finished surface or a protruding component.
Group products by their packing needs as well as their size. Look for combinations that could share a carton without forcing the packer to improvise.
A simple planning sheet is enough to start:
| What to record | Question it helps answer |
|---|---|
| Common order combinations | Which packs account for most dispatches? |
| Product and insert dimensions | What must fit inside the carton? |
| Packed weight and handling route | What conditions must the pack address? |
| Protective materials | How much space does the complete pack need? |
| Packing steps and storage space | Can the proposed range work on the floor? |
Use agreed measurements throughout. Identify internal and external dimensions explicitly when discussing sizes with a supplier. Our carton sizing guide explains why we quote external dimensions. Keep the board specification and measurement basis beside the dimensions so a later reorder is unambiguous.
Is it better to have fewer carton sizes or a closer fit?
Neither is automatically better. Trial the options with your real orders and compare the complete pack.
Suppose your range includes a small spare part, a medium assembly and a larger kit. These are hypothetical product groups, not fixed size recommendations.
You could test one carton for all three. You could also test a smaller carton for the spare part and assembly, with a separate carton for the larger kit. A third option is a dedicated size for each group.
Compare the complete pack under each option. Record the carton used, the protective materials, the packing steps and the space left inside. Avoid choosing the smallest box before checking whether the intended protection still fits.
For parcel shipments, check how the selected carrier treats packed dimensions. DHL explains that dimensional weight reflects the space a shipment occupies. The divisor depends on the shipping service, so use the rules that apply to your shipment. A smaller carton does not automatically produce a lower bill. See DHL's dimensional-weight guide.
What should I count besides the carton price?
Packing time, protective material use, carton storage and how often orders need an exception.
The carton price is one part of the comparison. A useful trial also records packing time, protective material use, carton storage and the frequency of exceptions.
Ask the packers which sizes are easy to select and which combinations cause uncertainty. Check whether two similar-looking cartons need clearer identification. Consider what happens when the preferred size runs out.
Avoid adding costs you cannot support. If damage history is incomplete, record that gap rather than assigning a guessed saving to a new box. A small measured trial is more useful than a precise-looking estimate built on assumptions.
How do I test a carton range before committing?
Run the proposed sizes through the actual packing process. Include the normal product combinations, the intended closure and the labels used at dispatch. Record which orders fit as planned and which need an exception.
Check the complete pack against its handling, storage and transport requirements. A layout that fits neatly is not proof of protection or stacking performance.
Choose a range you can explain in a short packing instruction. Each product group should have an assigned carton, an agreed arrangement and a clear exception route. Review the range when products, order combinations or shipping requirements change.
What should I send a supplier when reviewing my carton range?
If you are reviewing your carton range, send Exxo your common order combinations, product dimensions, packed weights and protective material requirements. You can discuss carton options around the complete pack rather than a size chosen in isolation.
For a new enquiry, use the contact section and explain which packing problem you want to resolve.