
Structural engineering
Turn your product into a box that fits, protects and ships cheap.
- Style + dieline (PDF / AI)
- Board, flute or rigid spec
- Insert, partition & ship-test notes
Structure, artwork, sample — the three services that take your pack from concept to run-ready. We engineer the box, prepare print-ready files, then prove it with a sample before you commit to mass production. Start at any step, or bundle all three.
A pack needs a structure before artwork and a sample before bulk — each step is a separate decision.

Turn your product into a box that fits, protects and ships cheap.

Put the artwork on the real dieline so it prints exactly as approved.

Prove fit, colour and the run with a physical sample before bulk.
Four quick routes. Each names the spot where a project usually stalls, the step that clears it, and what not to jump to.
| Where you are stuck | Do this first | What to bring | What it is not |
|---|---|---|---|
| Only a product and a target price | Structural engineering | Outer dimensions, packed weight, one photo, and the channel you sell through. | A bulk run before the structure is settled. |
| A finished design you are afraid to print | Prepress & artwork | An AI or PDF file, or a low-res file plus the brand colours. | Skipping the white dummy. |
| Hand-feel or assembly still unproven | White dummy sample | A structure that is already locked. | Signing off from a render. |
| Dieline and quantity already settled | Bulk quote | Quantity band, deadline, and any FSC or food-contact requirement. | Another round of unlimited free revisions. |
A heavy glass serum bottle kept arriving broken. Here is how one carton walked end to end in about three weeks.
No broken bottles on the first shipment — the same carton now runs for DTC and retail.
Four decisions that shape how a project runs — and what a catalog supplier does instead.
LeelinePackageYou own the dieline and tooling; we keep a master on file for reorders.
Typical supplierOften the supplier’s — you re-buy tooling or re-approve the structure each run.
LeelinePackageFree 3D mockup in 24h from a product photo or sketch.
Typical supplierSometimes a flat 2D proof, or a paid CAD file.
LeelinePackage3–5 days once the files lock.
Typical supplierOften 1–2 weeks, quoted as “7–15 days”.
LeelinePackageWe won’t run an order until you sign the sample.
Typical supplierSome run straight to production on the proof alone.
Quality management, responsible sourcing and food-contact materials — the certifications a buyer checks before placing an order.





A finished CAD file isn’t required to get going. A photo, rough dimensions and a quantity are enough to start — not sure what to measure? Tell us and we’ll name the few figures that matter most. The points below cover the usual brief; anything extra helps but is never required.

A real person reads every brief, then confirms the next step.
Tell Us About Your PackCorrugated and folding cartons, rigid gift boxes, mailers, paper and tote bags, and soft-pack pouches. The board, film and finish are matched to the protection the product needs. Share a reference pack or a photo and we’ll tell you honestly whether it’s a fit before you pay anything.
Our production MOQ is from 500 units, but we can run a lower first quantity or a small trial batch for market testing at a slightly higher unit cost. Volume breaks apply at 1k, 5k and 10k. Physical samples are available before you commit to a full run.
You usually pay a one-off setup plus any plate or tooling your structure needs, then a per-unit price that falls as quantity rises. The 3D mockup is free; material samples carry a small fee that is credited against bulk. The quote lists each line so the total is clear before you commit.
Our factory holds ISO 9001, and FSC-certified board and food-contact grades are sourced on request. Compliance paperwork for retail or cross-border selling is available on request. Tell us the market and we’ll confirm exactly which certification is backed with documents.
Packaging is the focus, not private-label products, so it’s not a fit for OEM goods, fashion bags or apparel. Unlimited free revisions with no brief aren’t offered, and a finished sample can’t ship overnight. If it isn’t a fit, we’ll say so and save you the cost.
Yes. We work under NDA on request. The dieline, artwork and any tooling are assigned to your product and never shown to or reused for another brand. When you reorder, the master file stays with you in case you ever move suppliers.
Send the product, quantity and channel — we’ll reply within 24–48h with a structure suggestion, whether your design can print, which sample to run and a rough price band.