What a spec sheet is for
An OEM quote is only as precise as the document behind it. Two factories given the same photo will quote two different shoes, because a photo does not fix the upper material, the midsole compound, the size grading or the packing - and every one of those unknowns gets filled in by whoever is quoting, silently. A spec sheet exists to close those gaps in advance: one document, specific enough that two factories reading it would quote the same shoe. The desk writes one for every OEM program before sampling starts, and the same discipline carries downstream - the approved counter-sample is checked against it, and bulk is inspected against both.
The sheet also disciplines the buyer, which is a feature. Writing the packing line forces the packing decision; writing the size run forces the demand question. A blank on a spec sheet is not a detail postponed - it is a decision delegated to someone with less context than you.
The sections, and what each one fixes
| Section | What it fixes | The trap when missing |
|---|---|---|
| Style and construction | Silhouette family; cemented or vulcanized build; platform | Sample and quote assume different builds |
| Upper materials | Main material, overlays and lining, by type | A cheaper substitute slips in unexamined |
| Outsole and midsole | Material and compound, color, durometer feel described | The shoe wears differently than sampled |
| Colors | Named per component, with the reference at hand | Colorways drift between production runs |
| Size range and grading | EU range such as 36-45; grading confirmed per program | The run fits the market next door, not yours |
| Size run per carton | The distribution inside each carton | Receiving counts pairs, not ratios |
| Packing | Shoe box spec, tissue, pairs per carton - stock ships 12; OEM per spec | Packing renegotiated after sealing |
| Carton marking | Model, color, size run, pieces per carton | Warehouse picking slows on every carton |
| Labels | Brand marks, content and origin labeling per destination rules | Compliance fixed at the border, expensively |
| Accessories | Laces, hang tags, insole prints, stuffing | The unboxing reads generic |
| Inspection basis | That bulk is checked against the sealed counter-sample | Findings become opinions, not decisions |
Eleven sections, and none of them is optional in practice - the only question is whether each is written before bulk or argued after. The sections most often skipped are packing and carton marking, and they are the two that warehouse staff, not buyers, end up paying for. The note on carton packing shows what the marking line feeds.
Writing it so it can be checked
A spec line is good when a stranger could verify it. "Quality upper material" cannot be checked; "split leather upper, lined with textile" can. "Comfortable cushioning" cannot; the midsole material and construction, named, can. Numbers belong where numbers exist - the EU size range, the pairs per carton, the size run - and where a figure is not fixed yet, the honest entry is "confirmed on the spec sheet per program" rather than a placeholder that will be forgotten. The desk's habit is to keep every line measurable or referenced: to a material name, a sealed sample, or a program document. Ambition reads badly on a spec sheet; verifiability reads well.
Tolerances deserve their own sentence. Production is physical, and every material and process varies within a band; the sheet's job is to name where the bands sit for your program, not to pretend they do not exist. How those bands are then checked statistically is the inspection question - covered generally in the note on AQL and common defects - but the inspection can only be as specific as the sheet it reads from.
One drafting habit keeps a sheet alive across a program: versioning. A spec sheet is amended - a correction list changes a material, a color is retired, a packing line is re-agreed - and the amended sheet should carry a version and a date, with the current version named on the program sheet. Without that habit, two people can be "working from the spec" and mean two different documents, which is how a settled question quietly reopens. With it, every quote, sample round and inspection in the chain reads from the same named version, and the phrase "per the spec sheet" means one thing to everyone who says it.
The labels line carries more than branding
Two lines on the sheet do double duty as compliance surfaces. The labeling line - what goes on the shoe and the box - is where material disclosure and country-of-origin requirements land for destinations like the United States, and it is least costly to satisfy when it is drafted into the sheet rather than retrofitted before shipping. The desk coordinates labels per destination rules and keeps the originals-only rule on the same line: marks and designs are the buyer's own generic property, never a reference to any third-party brand. Both topics have their own pages - compliance for the overview, and the note on US shoe labeling rules for the labeling line specifically.
Spec, sample, bulk: one chain
The sheet does not work alone; it works as a chain. The spec sheet governs the development sample. The correction list amends it. The counter-sample proves the amendments, and approval seals the pair as the production reference. Bulk is timed from that approval - typically about 45-60 days - and inspected against the sealed reference, with the sheet as the tie-breaker for anything the eye debates. Every link in that chain is already written down: sampling mechanics in the note on the sampling process, and the full production sequence on the production process page.
If you are starting a program, you do not need to arrive with a finished spec sheet - arriving with the raw decisions is enough, and the desk drafts the sheet from your brief for you to correct. Send the brief through the request form, and the first written reply will show you what your program looks like as a document. That document, not the conversation, is what the factory will build from.