What a manufacturing sample is
A manufacturing sample is a unit a supplier makes or supplies before, or during, production so the buyer can check it against the specification before committing money to an order. This guide covers manufacturing samples, not marketing samples: the free products companies hand to consumers, which are what the Wikipedia article on product samples describes. The two share a name and little else.
No regulator or standards body defines sample types or sample practice for sourcing. The vocabulary below is industry convention, and the meaning of any sample term in a given deal is whatever the buyer and supplier write down. A sample is a match for the specification only if the specification exists in writing first.
The main types of product sample
Each sample type answers a different question, and none answers all of them.
| Sample type | What it is | What it shows | What it does not show |
|---|---|---|---|
| Stock or catalog sample | A unit of a product the supplier already makes | The base product's general quality and function | How the buyer's custom version will turn out |
| Custom prototype | A first build of the buyer's design, often made by hand or with temporary tooling | Fit, form and whether the design works | Mass-production quality, cost or consistency |
| Pre-production sample (PPS) | A unit made with production materials and the production process | What the production run should look like | Consistency across thousands of units |
| Golden sample | The approved unit, signed and sealed, kept by both buyer and factory | The agreed reference for inspection and disputes | Anything not written into the specification |
| Shipping sample | Units drawn from the finished production lot | What was actually produced | Defect rates across the whole lot, unless sampled statistically |
The golden sample is the one that carries legal and practical weight. It is the physical reference against which an inspector checks the production lot and against which a dispute about "not what was approved" is settled.
The sample process, step by step
A sample round is only as useful as the documents around it. The sequence that holds up in a dispute runs as follows:
- Written specification first: dimensions, materials, finishes, colors, functions, packaging and any required tests.
- Sample request: the type of sample, the quantity, the price, the shipping method and who pays freight and duty.
- Evaluation: fit, function and materials, with laboratory testing where the product requires it.
- Feedback in writing: numbered comments with photographs, not a call or a chat thread.
- Revised sample: repeated until the sample meets the specification.
- Approval and sealing: the approved unit is signed, dated and sealed as the golden sample, with a counterpart kept by the factory.
- Contract reference: the purchase contract names the golden sample as the quality reference.
No source establishes how many rounds are normal. A simple catalog product may need one; a new design may need several, each adding time before production can start.
Why a good sample is not proof of capability
A sample shows that someone made one good unit, not that the factory can make thousands to the same standard. Prototypes are often built by hand, by a model shop or with temporary tooling, and a supplier can source an excellent sample from a different factory than the one that will run production. Treating a sample as proof of the factory's capability is one of the most common errors in sample practice.
Two steps close the gap. A pre-production sample made with production materials and process shows what the production line produces. Inspection of the production lot against the golden sample then shows whether the line held that standard. Inspection checklists are written from the golden sample and the specification, which is why a buyer who did not seal a golden sample has nothing firm to inspect against.
Paying for samples
Chinese suppliers commonly charge for samples and for express freight, and some credit the sample cost against the first production order. That is practice, not rule, and this guide gives no price benchmarks: sample cost depends on the product, the degree of customization and whether new tooling is needed.
The payment itself deserves the same controls as a production payment. Paying a sample fee to an account whose name differs from the supplier's registered company name is a recognized fraud pattern. A sample fee is often the first payment a buyer makes to a new supplier, so it is also the first point at which the beneficiary name should be checked against the supplier's business license.
US duty on samples since the 2025 de minimis suspensions
Low-value samples no longer enter the United States duty-free. The de minimis exemption, which had let shipments worth $800 or less enter without duty under 19 U.S.C. 1321, was suspended for China and Hong Kong in May 2025 and for all countries in August 2025, according to US Customs and Border Protection's (CBP) FY2025 IPR seizure statistics. As of October 2026, the suspension covers all countries and modes under Executive Order 14388 and two CBP interim final rules effective 24 June 2026 (FR Doc. 2026-12669 for postal shipments and FR Doc. 2026-12670 for other modes). The One Big Beautiful Bill Act (Pub. L. 119-21, sec. 70531) ends the exemption by statute on 1 July 2027.
In practice, a sample shipped by express courier now enters on a formal or informal entry and pays the applicable duties, including any Section 301 duty on Chinese goods. Samples sent by post go through CBP's postal entry process, which took effect on 24 July 2026. The buyer should agree in advance who acts as importer and who pays duty on samples, because an express carrier will bill whoever the shipping terms make responsible.
CBP also reports that 62% of its FY2025 intellectual-property seizures occurred in containerized commercial cargo, a shift it says is "likely due to" the de minimis suspensions. CBP describes the publication as workload statistics rather than official trade statistics, and the figure concerns counterfeit shipments, not samples. It does show that border enforcement now reaches ordinary commercial shipments, not only parcels.
Protect the design before sending a detailed sample brief
A sample request discloses design information, and the more detailed the brief, the more it discloses. The Office of the United States Trade Representative (USTR) reports in its 2026 Special 301 Report that rights holders enforcing trade secrets in China face "high evidentiary burdens, limited discovery" and difficulty enforcing confidentiality agreements (p. 51), and that bad-faith trademarks remain "one of the most significant challenges for U.S. brand owners in China" (p. 58). China's trademark system is first-to-file, so a brand shown on sample packaging before it is filed in China is exposed.
The order of steps follows from that: register the brand, put a confidentiality agreement in place, and only then send drawings and full specifications for a custom sample. Stock samples, which disclose nothing of the buyer's, can be ordered earlier.
Common mistakes with product samples
- Approving a sample without sealing a golden sample. Without it, the inspection and any dispute rest on memory and photographs.
- Treating a sample as proof of the factory's capability. A sample may be hand-made or made elsewhere; a pre-production sample and inspection test the production line.
- Paying for samples to an account in a different name. The beneficiary should match the supplier's registered company.
- Giving feedback by chat. Unrecorded comments are hard to enforce on the next round or in the contract.
- Assuming samples arrive duty-free. Since 2025 they do not.
Frequently asked questions
Do Chinese suppliers charge for samples?
Commonly, yes. Suppliers often charge for the sample and for express freight, and some credit the sample cost against the first production order. That is practice rather than a rule, and the amount depends on the product and how much customization or new tooling the sample requires. Agree the price and refund terms in writing before paying.
What is a golden sample?
A golden sample is the approved reference sample that the buyer and the factory both keep, signed, dated and sealed. Inspectors check the production lot against it, and the purchase contract should name it as the quality reference. Without a sealed golden sample, there is no agreed physical standard for inspection or for settling a dispute.
Will I pay US duty on samples from China?
Yes, as of October 2026. De minimis duty-free treatment was suspended for China and Hong Kong in May 2025 and for all countries in August 2025, and it remains suspended under Executive Order 14388 and CBP interim final rules effective 24 June 2026. Samples now pay applicable duties, including Section 301 duty where it applies.
What is a pre-production sample?
A pre-production sample (PPS) is a unit made with the actual production materials and process before mass production starts. It shows what the production line will produce, which a hand-built prototype cannot. Approving the PPS and sealing it as the golden sample gives the inspection that follows a reliable reference.
How many sample rounds are normal?
No source establishes a normal number. It depends on the product's complexity, how complete the written specification is and how quickly feedback is given. A catalog product may need a single round; a new design may need several revisions before a pre-production sample can be approved and sealed.
Should I sign an NNN agreement before sending sample specifications?
For a custom design, putting a confidentiality agreement in place and registering the brand in China before sending detailed specifications is the safer order. USTR's 2026 Special 301 Report describes high evidentiary burdens in Chinese trade-secret cases and calls bad-faith trademarks a leading problem for US brand owners. Stock samples disclose nothing and can be ordered earlier.
Does a good sample mean the factory can produce the order?
No. A sample may be made by hand, with temporary tooling or by a different factory, so it shows that one good unit exists, not that the line can repeat it. A pre-production sample made on the production process, followed by inspection of the lot against the golden sample, tests the factory's actual capability.
Sources
- U.S. Customs and Border Protection — Intellectual Property Rights Seizure Statistics, Fiscal Year 2025 (Publication 5471-0326)
- Office of the United States Trade Representative — 2026 Special 301 Report (citing OECD-EUIPO studies)
- U.S. Customs and Border Protection (DHS) — CBP Interim Final Rule, 91 FR 37801 (citing Pub. L. 119-21)