Why sampling exists at all
Between a design on paper and a production order sits a gap that only physical shoes can close. Drawings do not show how a knit upper behaves when lasted, how a foam compound reads in daylight, or where a panel seam lands once the shoe is three-dimensional. Sampling exists to move every one of those discoveries into a cheap, slow round instead of an expensive, fast one: a pair of samples can be corrected for the cost of a conversation, a bulk run of five hundred pairs cannot. The desk treats sampling as the most important fortnight in an OEM program - typically about 15-30 days for development and counter-sample together - because everything after it inherits whatever the samples settled.
The window is a reference range, not a promise: material availability, the number of correction loops and the season all move it. What keeps it short is not pressure but precision - a specific brief and a specific correction list each round.
The two rounds, and what each one proves
Footwear sampling is usually described as one event, but it is two, with different jobs.
| Round | What it answers | Where it sits |
|---|---|---|
| Development sample | Can the design be built at all - proportions, materials, construction | First half of the 15-30 day window |
| Counter-sample | Does the revised shoe match your corrections exactly | Second half of the window |
| Pre-production reference | The frozen standard that bulk is inspected against | On the line, before bulk runs |
The development sample is where honesty pays. Its job is to expose problems, not to look finished: an upper that reads too heavy, a midsole that sits wrong under the heel, a color that shifts under shop lighting. A buyer who lists every correction after the first sample - in writing, with photos - usually gets a counter-sample that closes them. A buyer who approves a first sample out of politeness has simply moved those corrections into bulk, where each one costs time and exactly none of them gets cheaper.
The counter-sample is the design, corrected. It should differ from the development sample only in the ways your correction list named. Anything else that changed is worth a question before approval, because approval is what freezes the standard: from that point, the counter-sample becomes the reference the factory, the desk and the inspection plan all read from.
What to check when a sample lands
- Fit first. Try the graded sizes, not just the sample size. Where the grading lands on the foot is a fitting fact, not a paperwork fact.
- Materials against the spec. Upper, lining and outsole compared with the spec sheet line by line - by hand, not by memory of the quote.
- Construction. Bond line at the sole edge, stitching on high-tension seams, the lasting line where upper meets sole.
- Color, in daylight. Components side by side under neutral light; artificial light hides the shifts your customers will see.
- Markings. Any label or mark placed, sized and spelled as the spec says - this is the least expensive moment to fix it.
- Wear it. A short wear test on a real surface tells you what a desk review cannot: flex points, heel slip, hot spots.
Six checks, and they divide cleanly: the first four you can do alone, the last two benefit from the desk comparing your notes against the spec. The output of the round is not an opinion - it is a written correction list, item by item, or an approval.
Why sampling slips, and who controls it
Three things stretch the 15-30 day window in practice. Material: a specified material that is not on hand adds procurement time before cutting starts. Corrections: every loop of revisions adds a round, which is why the first correction list should be complete rather than trickle-fed. And calendar: sampling queuing behind other programs before peak season runs slower than sampling in a quiet month - the same peak effect that lengthens bulk, felt earlier. None of these three is controlled by chasing; all three are controlled by the brief. The desk's habit is to confirm material availability before the development sample is timed, and to refuse to forward a partial correction list because it invites a second loop.
Approving the counter-sample, properly
Approval is a procedure, not a feeling. The counter-sample is compared against the spec sheet and the correction list, line by line; the approved pair is marked as the sealed reference; and the program sheet records that bulk will be inspected against it. From that moment, changes are not free. A late swap of lining material is not a detail - it reopens procurement, re-times the line and re-dates the bulk clock of about 45-60 days. The desk's advice is mechanical: if a change is worth making, make it before approval and pay for it in days; after approval, the same change is paid for in weeks. How the approved reference turns into an inspection standard is covered in the note on shoe quality inspection, and the document both rounds read from in the spec sheet note.
Sampling on the stock route
One contrast closes the picture. The stock route needs no sampling round because the shoes already exist: what proves a stock program is a pilot - a few cartons, 12 pairs each, mixed models allowed, picked on confirmation and typically dispatched within days. Stock cartons are their own sample, straight from the partner's warehouse, which is why sellers testing styles usually start there and carry the winners into OEM development. The two clocks sit side by side on the MOQ and lead time page. If you have a design ready for its first round, or a stock category ready to become one, the request form starts either conversation - and the first reply will name the sampling plan and its reference window in writing. For where sampling fits in the full production sequence, see the production process page; for the tooling that sits behind the sample, see tooling and molds.