When you hold a premium rigid box, much of what makes it feel expensive is invisible: the board underneath the printed paper. Greyboard thickness decides whether a lid feels solid or flimsy, whether a large box keeps its shape, and how much the box costs and weighs to ship. Yet thickness is one of the most commonly mis-specified items in custom rigid box orders. This guide explains how greyboard is measured, what typical thicknesses are used for different box types, and how to choose the right one for your product.
What Is Greyboard?
Greyboard, also called chipboard or grey cardboard, is a dense, solid board made from recycled paper fibre pressed into layers. It is the core of a rigid box: printed art paper or specialty paper is wrapped around it and glued, which gives rigid boxes their stiffness compared with folding cartons. Unlike corrugated board, greyboard is solid, not fluted, so it feels firm and does not crush as easily.
How Greyboard Is Measured
Thickness is quoted in millimetres, and density is quoted in grams per square metre (gsm). Common specifications include 1.0 mm, 1.5 mm, 2.0 mm, 2.5 mm and 3.0 mm, and a typical grade runs from about 1,000 gsm for 1.5 mm up to roughly 2,000 gsm for thicker 3 mm sheets. Always confirm both thickness and gsm with your supplier, because two boards labelled 2 mm can differ in density and stiffness. Also check the tolerance, since small variations in thickness can affect how a lid fits.
Typical Thickness by Box Type
| Box type | Typical greyboard | Notes |
|---|---|---|
| Small jewellery or ring boxes | 1.0–1.5 mm | Light products, compact size |
| Cosmetics, skincare gift boxes | 1.5–2.0 mm | Standard premium feel |
| Magnetic closure boxes | 1.5–2.5 mm | Lid must hold magnets flat |
| Large apparel or gift set boxes | 2.0–3.0 mm | Larger panels need more stiffness |
| Wine, liquor, heavy products | 2.5–3.0 mm | Heavy load, needs strong base |
| Foldable rigid boxes | 1.5–2.0 mm | Hinge areas need flexibility |
These are common starting points and not rules. Your final choice depends on product weight, box dimensions and how premium you want the box to feel.
Factors That Should Drive Your Choice
Product weight
A 200 g serum set and a 2 kg liquor bottle need very different boxes. Heavier products need thicker board, especially in the base and shoulders.
Box size
Large flat panels flex more than small ones. As a rule of thumb, the bigger the box, the thicker the board should be. A large apparel box in 1.5 mm board can bow in the lid; the same design in 2.5 mm will not.
Closure type
Magnets need a firm lid that sits flat; a thin lid can warp and gap. See our comparison of magnetic closure vs drawer boxes for structural differences. Drawer boxes need rigid trays that slide smoothly, so thin board can make drawers feel loose.
Premium feel
Thicker board creates a heavier, more substantial in-hand feel, which customers associate with quality. But more is not always better: an oversized wall on a small box looks clumsy and wastes money.
Shipping and cost
Thicker board costs more, weighs more and makes each box take up more space in cartons, which raises freight. Our landed cost guide and pricing breakdown show how these items combine.
Thickness and Box Dimensions
Because the board has thickness, it takes up space inside the box. A 3 mm wall removes 6 mm from the internal width compared with the outer dimension, and the wrapping paper adds a little more. This is why we always recommend specifying internal dimensions for your product and letting the factory calculate outer size. Our guide on inner vs outer size walks through the arithmetic.
Greyboard Quality and What to Ask
- Density and stiffness: Ask for gsm and, if available, a stiffness or bending test result.
- Flatness: Warped sheets cause crooked lids and visible wrinkles under the paper.
- Moisture content: Overly damp board can warp after wrapping, especially in humid climates.
- Recycled content and certification: If you need FSC claims, confirm the board and paper are covered by the chain of custody. See our FSC packaging guide.
- Consistency: Request that the production board matches the sample’s thickness and brand.
Wrapping Paper and Lamination Interaction
The wrapped paper also affects stiffness and finish. Thin art paper over thick board may show board edges or wrinkles; heavier or textured papers hide imperfections and add rigidity. Lamination and foil also add a slight stiffness. Choose paper and board as a pair: see our wrapping paper guide and finishes guide.
Alternatives to Thick Greyboard
If you want a rigid look without the weight or cost, consider:
- Thinner board with internal reinforcement such as a lined tray or an insert that supports the lid.
- Folding cartons in heavier paperboard, which are cheaper and ship flat; see rigid box vs folding carton or browse folding boxes.
- Foldable rigid boxes that ship flat; see foldable vs traditional rigid boxes.
How to Test Before You Commit
- Request white samples in two thicknesses and compare in hand.
- Load the sample with the real product and shake, stack and open and close it repeatedly.
- Check the lid for warping after a few days, particularly in humid conditions.
- Approve the final board thickness in writing on the pre-production sample.
Our sample types guide explains how to sequence these samples.
Frequently Asked Questions
What is the most common greyboard thickness?
1.5 mm and 2.0 mm cover most cosmetics, jewellery and gift boxes.
Is thicker board always better?
No. Choose the thickness that supports your product and size; extra thickness adds cost and freight without benefit.
Does board thickness affect MOQ?
Not usually, though specialty board grades may have their own minimums. Standard MOQ is around 1,000 units.
Specify the Right Board With Caiye Packaging
Caiye Packaging has produced custom rigid boxes since 2005, with factories in Dongguan and Vietnam, and holds FSC, ISO 9001, BSCI and SMETA certifications. Tell us your product size and weight and we will recommend board thickness and construction with your die-line. Learn about our OEM packaging or about us, browse the FAQs, email Harriet@dgcaiye.com or visit our contact page.