Custom Cardboard Boxes: Sizes, Materials and Pricing

Key Takeaways

  • Cardboard describes two different materials: paperboard, a single solid sheet measured in points of caliper, and corrugated, a fluted layer glued between two liners.
  • Paperboard caliper is measured in thousandths of an inch, so 18pt board is 0.018 inches, roughly 0.46 mm, and most retail cartons run between about 14pt and 24pt.
  • Anything that will be shipped on its own, stacked on a pallet, or handled by a carrier should be corrugated rather than paperboard.
  • iBox Factory makes custom cardboard boxes from a minimum order of 100 boxes, from about $0.48 per unit at bulk volumes confirmed on your written quote, with the die and plates included.

Almost every quoting mistake in this category starts with the word cardboard, because two suppliers can hear it and picture two completely different materials. This guide separates them, gives you the thickness scale for each, and tells you which one your product needs. To order a standard construction, use the cardboard boxes page.

Paperboard: one solid sheet

Paperboard is a single sheet, smooth on at least one side, and it is what most retail cartons are made from. Thickness is quoted in points of caliper, where one point is a thousandth of an inch. It folds crisply, prints well, and folds flat for storage. It is not a shipping material on its own.

CaliperThicknessTypical use
14pt0.014 in, about 0.36 mmLight cartons, sleeves, bands
16pt0.016 in, about 0.41 mmSmall retail cartons, cosmetic and supplement boxes
18pt0.018 in, about 0.46 mmThe common all rounder for retail folding cartons
20pt0.020 in, about 0.51 mmLarger cartons and heavier contents
24pt0.024 in, about 0.61 mmStiff cartons, larger panels that must not bow

Corrugated: fluted, and much stronger

Corrugated is a wave of paper glued between liners, which is why an empty corrugated box holds its shape and a paperboard carton collapses. The wave is called a flute, and the flute profile sets the wall thickness: E flute is about a sixteenth of an inch, B about an eighth, C about five thirty seconds, and BC double wall around nine thirty seconds. E flute prints closest to paperboard quality, which is why retail products that also ship direct often land there.

Choosing between them

Ask one question: does this box have to survive a journey on its own? If the carton will sit inside a shipper, or be handed over a counter, paperboard is lighter, cheaper and prints better. If a carrier will handle it, if it will be stacked, or if the contents have any weight to them, use corrugated. The expensive mistake runs in one direction: a beautiful paperboard carton sent through a parcel network arrives creased, and no amount of print quality recovers that.

A middle path exists. Many brands use a printed paperboard carton for the retail unit and a plain corrugated shipper around a batch of them, which keeps print costs on the piece the customer sees.

Sizing, whichever material you pick

Give inside dimensions in the order length by width by depth, and measure the product as it will actually be packed, including any wrap, bag or leaflet. Corrugated has more manufacturing tolerance than paperboard because the wall is thicker, so allow a little clearance on a snug fit rather than designing to the exact millimeter.

What either material costs to run

The minimum is 100 boxes in either material. Pricing starts from about $0.48 per unit at bulk volumes and is confirmed on your written quote, since caliper or flute, size, ink coverage and finishing all move it. The die, the plates, design support and US shipping are included, and you see a digital proof before anything prints. Production on the standard lane starts from about 7 business days, with 2 to 5 more for delivery, and the rush and cost saver lanes are quoted per job.

Get the material decided on a quote

Describe the product and how it will travel in the quote form and we will recommend a caliper or a flute with the price. For a deeper comparison read corrugated versus cardboard, and for the thickness decision on retail cartons see what paperboard thickness to use.

Get a Custom Quote

Free die and plates, free design support, free US shipping. Minimums from 100 boxes.