TL;DR: A brief that leaves out internal dimensions, wall material spec, and print-ready files will generate a quote that doesn’t survive first sample review — budget an extra 2–3 weeks if that happens.
TL;DR: Incomplete briefs account for roughly two-thirds of the requote cycles we see on mailer and subscription box projects; specifying dieline, board grade, and finish in the initial RFQ cuts average sample iterations from 3 down to 1.5.
What a Supplier Actually Needs Before They Can Quote You Accurately #
Most quotation requests we receive for branded mailers and subscription boxes fall into one of two categories: over-specified on brand visuals and under-specified on structure, or vice versa. Neither gets you a usable quote on the first pass.
Before any price can be confirmed, we need six pieces of structural information: internal dimensions (L × W × D in millimetres, not inches — or if you send inches, flag it clearly to avoid conversion error), target board grade, wall construction, closure type, quantity tiers, and shipping destination. Without all six, any number we give you is a ballpark, not a binding quote. We track these initial brief gaps under what our team calls the RFQ-Completeness Flag in our project intake form — a job that triggers this flag at intake takes an average of 4.2 additional business days to move to formal quotation compared to jobs that arrive with complete briefs.
On dimensions specifically: internal dimensions drive everything downstream. They determine blank size, board yield, insert geometry if applicable, and how the box nests for pallet stacking. If you give us external dimensions only, we have to back-calculate the internals based on assumed wall thickness — and if we assume 3mm E-flute and you actually need 4mm B/E double-wall, your finished inner dimensions will be 2mm short per wall pair. That’s the difference between a product fitting the box and the box lid not closing.
The Structural Parameters That Define Your Quote — and Your Sample #
Board grade and construction are where supplier quotes diverge most. A subscription box quoted in 350gsm coated duplex (common for rigid-style paper mailers) will carry a different unit cost from the same box in 3mm E-flute corrugated with a 150gsm kraftliner. Both can look identical in a rendered image. They perform very differently under ISTA 2A transit testing, which we use as our baseline for validating e-commerce mailer performance.
The parameters we need stated explicitly:
Board construction: Single-wall E-flute (3mm), B-flute (3.2mm), or double-wall EB-flute (7mm) for corrugated; or greyboard weight (1200gsm, 1400gsm, 1600gsm) for rigid-style constructions. If you don’t specify, we default to what’s most common in your product weight range — but that default may not match what a competing supplier assumes, making quotes incomparable.
External print substrate: Coated white kraft liner (most common for subscription boxes — 150gsm or 175gsm), uncoated kraft (better recyclability credentials under EU PPWR Article 6 requirements), or laminated art paper wrap (adds a separate process step and roughly 3–5 working days to lead time).
Surface finish: Matte or gloss lamination, aqueous coating, or no coating. Soft-touch matte lamination is the most-requested finish on subscription boxes we run, but it requires a minimum 2-day post-lamination cure before diecutting — this is factored into our standard 18–22 working day production lead time for printed mailer boxes at MOQ 500 units.
| Parameter | Common Specification | Impact if Unspecified |
|---|---|---|
| Board grade (corrugated) | E-flute 3mm / B-flute 3.2mm | Quote based on wrong wall = dimensional mismatch |
| Print substrate weight | 150–175gsm coated white liner | Cost variance of 8–12% between grades |
| Surface finish | Soft-touch matte lamination | 2–3 day add to lead time; not reflected in baseline quote |
| Quantity tier | 500 / 1,000 / 2,500 / 5,000 units | Each tier may use different production method |
| Closure style | Tuck-end, crash-lock, magnetic snap | Structural die cost varies by $180–$350 USD between types |
The most commonly overlooked parameter is the closure style. Tuck-end mailers use a flat dieline with no additional hardware. Crash-lock auto-bottom constructions require a more complex die and a gluing step — that adds tooling cost. Brands frequently request a crash-lock quote when a tuck-end would serve their product weight (under 800g) just as well, inflating the per-unit cost without a functional reason.
Sample Types and When to Request Each One #
There are three sample stages, and requesting the wrong one for your project phase wastes time in both directions.
If your structure is unconfirmed, request a white (unprinted) structural sample first. This costs us nothing to produce beyond shipping, and it lets you check fit, closure feel, wall rigidity, and assembly before committing to print. We can typically turn around a white sample from our stock board in 5–7 working days. For custom dimensions outside our standard size library, allow 8–10 working days for diecutting.
If your structure is locked but artwork is still in progress, hold off on requesting a colour proof. A printed proof produced before artwork is final almost always generates a second proof request — that adds 10–14 days and a reprint cost. Coordinate internally so artwork reaches 95% sign-off before requesting printed proofs from us.
Production samples (also called pre-production samples or PPS) come after the die is confirmed and a short print run is made on production equipment. This is what you should evaluate against for colour, registration, and finish. Our registration tolerance on offset-printed mailer boxes runs ±0.3mm on a good day; if your design has fine-detail typography sitting inside a 1mm border from a fold line, we flag this during pre-press and may recommend a structural adjustment before sampling begins.
For subscription boxes with insert trays or foam dividers, always request the complete assembled sample — not components separately. Fit issues between the outer shell and the insert layer are the number-one source of post-sample revision requests in our mailer project intake, and they only appear when the two parts are combined.
Decision Framework: What Affects Your Quote at Each Stage #
If you’re working to a fixed cost target, the most effective lever is quantity tier. The unit cost delta between 500 and 2,500 units on a standard printed E-flute subscription box runs roughly 22–28% in our pricing, because plate amortisation and setup costs spread across more units. Going from 500 to 1,000 units is where you recover setup cost fastest, proportionally.
If you’re comparing quotes from multiple suppliers, make sure every supplier is quoting the same board spec. A quote that comes in 15% cheaper may be using 140gsm liner instead of 175gsm, or 2.8mm E-flute instead of 3mm — both legal, both functionally different. Ask each supplier to confirm board caliper and liner weight in writing. Quotes that don’t include this are not directly comparable.
If your delivery timeline is under 25 working days from artwork approval, ask explicitly whether that lead time assumes existing tooling or includes new die production. A new corrugated die for a custom-dimension box takes 5–7 working days on its own. If the supplier quotes 20 working days but hasn’t flagged die lead time, you may lose a week discovering this after you’ve approved artwork.
One non-obvious boundary: if your subscription box ships internationally and crosses into the EU market, the choice between virgin fibre and recycled content board becomes a compliance question, not just a cost question. Under the EU PPWR framework taking effect from 2030 (with transition guidance already in circulation), recycled content thresholds for paper-based e-commerce packaging are expected to rise. Board spec decisions made today for subscription box programmes with 2–3 year shelf lives should account for this.
Specification Notes for Brand Partners #
When you brief us on a mailer or subscription box project, the single most useful thing you can send is a completed dieline or at minimum a rough dimension sketch with annotated internal clearances for the primary product. If you have a physical product prototype, its dimensions in millimetres plus its weight in grams closes roughly 80% of the structural questions we’d otherwise ask.
The most common gap in initial briefs is missing insert information. If your box will contain a foam insert, paper tray, or pulp moulded liner, we need to know that upfront — it affects internal dimension calculation and material cost. Briefs that arrive without insert details almost always require a re-brief after first sample review, adding one full sample iteration.
Our standard timeline runs 5–7 working days for white structural samples (stock board), 12–15 working days for first printed proof (from confirmed artwork), and 18–22 working days for production samples at MOQ 500 units. Custom board specifications or specialty finishes (foil, emboss, spot UV) add 3–5 working days to each stage. Accurate artwork at brief submission is the single biggest variable we can’t control on our end.
How should I send my artwork files?
Send layered PDF or AI files at 300 DPI minimum, with 3mm bleed on all sides and all fonts outlined. CMYK colour mode only — RGB files submitted for offset print will shift on conversion and the output colour is hard to predict. If you have Pantone references, list the specific Pantone Coated codes alongside the CMYK builds; for subscription boxes especially, where brand colour consistency matters across repeat orders, having the Pantone reference as the anchor is worth the investment in spot ink if your run volume supports it (typically above 1,000 units).
What quantity should I quote at if I’m not sure of my forecast?
Request pricing at two or three tiers: 500, 1,000, and 2,500 units are the most useful brackets for early-stage brands. This shows you the unit cost curve and lets you make an informed decision once you have better sales data. Don’t commit to a single quantity in your RFQ if you’re genuinely uncertain — a range brief costs us no more to quote and gives you better information.
Can I request samples before confirming an order?
Yes. White structural samples are provided at no charge for standard-dimension requests; we cover tooling cost internally. For custom dimensions requiring new diecutting, we charge a nominal sample tooling fee that’s credited back against your production order. Printed proofs carry a setup charge reflecting ink and plate costs for short runs — the specific amount depends on number of colours and box size, so ask us to confirm before submitting artwork.
What’s a realistic timeline from first enquiry to receiving production samples?
For a straightforward single-colour or two-colour subscription box with no special finishes: 5–7 working days for white sample, up to 15 working days for printed proof from artwork approval, then 18–22 working days for production samples. That’s roughly 6–8 weeks end-to-end if everything moves without revision. The most common delay is a second proof iteration triggered by colour or registration feedback — building in one revision cycle at the planning stage is realistic.
How do I evaluate whether two supplier quotes are actually comparable?
Ask both suppliers to provide board caliper (in mm), liner weight (in gsm), and inks/finish specification in writing alongside their unit price. A quote without these three data points cannot be compared meaningfully against another quote that includes them. Price differences of 10–18% between suppliers often trace to unspecified board grade differences rather than margin.
Planning a packaging project? Contact our team to request a complimentary specification review and sample quote.
