A rigid box is specified by four decisions, in this order: the construction (lid-and-base, shoulder-neck, drawer, or magnetic closure), the grey board caliper, the wrap material and finish, and the insert or fitment. Get those four right and the quote request is nearly complete — the remaining inputs are internal dimensions, quantity, and artwork.
This guide walks through each decision so you can brief a supplier and compare quotes on the same terms.
What a rigid box actually is
A rigid box — also called a set-up box — is a pre-formed box made by wrapping a stiff grey board (chipboard) with paper or a specialty material. Unlike a folding carton, which is printed flat and folded into shape, a rigid box is built to keep its form: the board supplies the structure and the wrap carries the print and finish. Because the board is thick and the box is pre-glued, rigid boxes are heavier and bulkier per unit, so they are usually used where presentation and perceived value matter — gifting, beauty, electronics, and wine and spirits — and shipped inside a secondary carton rather than mailed as-is.
For a supplier-side walkthrough of the same specification sequence, see Progress Packaging's How to Specify Custom Rigid Boxes: progresspackaging.co.uk/insight/how-to-specify-rigid-boxes.
For the cost, freight and unboxing trade-off between the two formats, read Folding cartons vs rigid boxes.
Step 1 — Choose the construction style
The construction sets how the lid and base open and how the box is assembled. Foldveil rigid boxes cover four common styles; choose this first because it drives the structure and tooling.
| Style | How it works | Typical use |
|---|---|---|
| Lid and base (telescoping) | A separate lid drops over a separate base tray | The standard premium format; versatile |
| Shoulder-neck | The base has a raised collar that the lid grips onto | Gifting, fragrance, jewellery |
| Drawer / slide | A tray slides out of a sleeve | Sliding-reveal unboxing, subscription kits |
| Magnetic closure | A lid flap with magnets snaps shut over the base | Beauty, electronics, wine and spirits |
Step 2 — Specify the grey board caliper
The rigidity of a rigid box comes from the grey board (chipboard) under the wrap. Caliper is the board thickness; suppliers usually express it in gsm or millimetres. Most rigid boxes use roughly 1 mm to 3 mm of board, with larger or heavier products going thicker. Board density varies between mills, so a gsm-to-millimetre equivalence should be confirmed against the selected factory rather than assumed.
Starting reference points, not universal standards:
| Product weight / box size | Common starting caliper |
|---|---|
| Light items, small boxes (lipstick, jewellery) | ~1.0–1.5 mm |
| Mid-weight (skincare set, candles) | ~1.5–2.0 mm |
| Heavy or large (bottle, electronics) | ~2.0–3.0 mm |
The exact caliper is confirmed per project with the factory, together with the material and structure.
Step 3 — Choose the wrap material and finish
The wrap is what the customer sees and touches. Most rigid boxes are wrapped in printed paper; Foldveil's default for rigid boxes is offset printing on paper, with specialty papers available for a textured or tactile finish.
Common wrap and finish choices:
- Paper wrap, offset-printed — the default for detailed graphics at a controlled cost
- Specialty paper — textured, embossed or coloured stock for a premium hand feel
- Fabric wrap — linen or similar, for a soft-touch luxury finish
- Foil stamping, embossing/debossing, spot UV — added on top of the wrap for logos and accents
Put the finish in the RFQ as part of the artwork brief, and share Pantone or foil references at the same time you send the dieline.
Step 4 — Define the insert or fitment
An insert holds the product in place and is usually a separate component: a folded paperboard tray, a molded pulp tray, or a die-cut foam or EVA inlay. Choose it by product weight and the failure mode you are protecting against.
- Paperboard tray / folded insert — light items; clean look and fully paper-based
- Molded pulp tray — cushioning with a fibre-based, plastic-free story
- Foam or EVA inlay — heavier or fragile products where a precise, resilient fit matters
For a fibre alternative to foam, read Molded pulp trays: when fiber inserts beat foam and bubble.
What to send in a rigid box RFQ
A complete rigid box enquiry includes:
- Internal dimensions (length × width × depth) and the product's own dimensions
- Construction style and closure
- Grey board caliper, or the product weight so the supplier can propose one
- Wrap material, print process and finish
- Insert type and material
- Quantity and target market
- Artwork or a dieline, if available
Sending these together lets a supplier quote the structure, tooling and finishing in one pass, instead of a back-and-forth that starts from the same three questions.