Buying guide · updated November 2026
Foldable Magnetic Boxes and Freight
Overseas freight is charged by volume or weight, whichever is higher, and set-up rigid boxes are mostly air. A foldable magnetic box ships flat, so the same order fills far fewer cartons. The deeper the box, the bigger the saving; we give you both carton counts when we quote.
Key takeaways
- Freight is charged on volume when cargo is light for its size, and empty rigid boxes are.
- A foldable magnetic box packs flat, so the same order needs far fewer cartons.
- The deeper the box and the longer the route, the larger the saving.
When is a foldable box worth it?
When you ship by air or sea, store boxes before packing, or order large quantities of a deep box. For small, shallow boxes the saving is smaller and a fixed rigid box may be simpler.
Does the customer notice the difference?
Once assembled, the walls are the same rigid board and the magnetic flap closes the same way. The hinge lines are visible only on close inspection.
How do I compare the two options?
Ask for a quote on both. We list unit price, carton count and carton size for each, so your forwarder can quote the freight.
How is freight on boxes actually calculated?
Carriers compare the actual weight of a shipment with its dimensional (volumetric) weight and charge whichever is higher. Dimensional weight is carton length × width × height divided by a divisor set by the carrier, commonly 5,000 for express couriers and 6,000 for air freight when measured in centimetres and kilograms. Sea freight is priced per cubic metre. Check your carrier's current rule, then test a carton in our dimensional weight calculator.
How much space does a foldable box save?
A set-up box occupies its full outer volume. Folded flat, the same box is a stack of board a few centimetres thick, so volume typically falls by well over half, and more for deep boxes. The exact figure depends on your size, which is why we list carton size and carton count for both versions on the quote.
How do fixed and foldable boxes compare?
| Fixed rigid box | Foldable magnetic box | |
|---|---|---|
| Delivered | Assembled | Flat |
| Carton volume | Highest | Much lower |
| Work at your warehouse | None | A few seconds per box |
| Look once assembled | Seamless walls | Fine hinge lines at corners |
| Best for | Local delivery, small boxes | Export, e-commerce, storage |
What are the drawbacks?
Someone has to fold each box before packing, the unit price is usually a little higher than a simple lid and base box, and very small boxes save little. Inserts ship separately and are dropped in after assembly.
Want a price for your box? Send style, size and quantities — we reply within 24 hours.
Sources and further reading
Related pages
More buying guides
Quick answers
What is a collapsible rigid box?
It is another name for a foldable magnetic box: a rigid-board box with hinged walls that folds flat for shipping and is held in shape by corner adhesive or magnets.
Do foldable boxes come with inserts?
Yes. Card inserts are packed flat or separately and placed in the box after it is assembled.
Can I get quotes for both versions?
Yes. Ask for fixed and foldable prices together; we list unit price, carton size and carton count for each so your forwarder can quote freight.
