Tech Packs for Custom Apparel Production

A tech pack is the document that translates a design into a producible garment, and for custom apparel production it is the difference between samples that match your vision and samples that need three rounds of guessing. A complete tech pack carries technical flats, measurement specs, fabric and trim details, construction notes, and artwork placement, so the factory can quote accurately and sew without asking questions.

Factories do not read minds, and every unstated detail becomes an assumption that costs a sampling round. A garment is hundreds of small decisions, and a tech pack is where those decisions get made on paper instead of on your budget. Brands that send a reference photo with hopes rather than a spec sheet with numbers pay for it in weeks of delay and in units produced to the wrong spec. This guide explains what goes into tech packs, how detailed each section needs to be, and how the document changes when you produce with a cut and sew partner versus a POD provider.

The Core Sections of a Tech Pack

Every tech pack opens with technical flats: flat drawings of the garment front, back, and details, with callouts labeling each component. Then come the measurement specs, a table of body and garment dimensions per size with tolerances, which is the section factories check first. Fabric and trim pages list material composition, weight, colors with codes, and supplier references, and the bill of materials counts every label, button, and thread color so nothing arrives unpriced.

Construction notes describe stitch types, seam finishes, and assembly order in the language factories use, and artwork pages show print or embroidery placement with exact dimensions measured on the garment, with artwork prepared to the standards in the print-ready files guide. A page for packaging and labeling closes the pack, since polybag specs and care labels are production details that shipping teams also consume, and leaving them out is how first orders ship without the right labels.

Measurement Specs: Where Tech Packs Earn Their Keep

Measurements decide whether the sample fits, and vague grading is the most expensive gap in amateur tech packs. Specify each point of measure, such as chest width, body length, and sleeve opening, for every size in the range, and add a tolerance, typically half a centimeter, so the factory knows what counts as out of spec. Include how to measure, because a chest measurement taken below the armhole reads differently than one taken above it, and disputes vanish when the method is written down, which is why professional sample reviews reference the measurement table by row rather than by impression.

Fit intent matters too: mark whether a garment is meant to be slim, regular, or oversized, and reference a fit model size. The same numbers read differently across fit intents, and factories can flag a conflict between numbers and intent, which saves a sampling round when they do.

Tech Packs in POD and Cut and Sew Workflows

The document scales to the production model. A cut and sew factory needs the full pack, and the conversation quality you get from a manufacturer often tracks the quality of the document you send, because ambiguity in a tech pack becomes an assumption on the cutting table. A print on demand provider needs a slice of it: artwork files with placement and dimensions, garment color and size, and fabric preferences where the platform offers choices, because construction is already standardized and the platform handles it, while the product catalog defines what fabric choices exist. The comparison of cut and sew vs print on demand brand fit explains when the full document earns its cost.

Even in POD, keeping a lightweight tech pack per product pays off in three ways: it standardizes placement across a catalog, which keeps mockups and delivered products aligned, keeps mockups honest, and makes switching providers painless, since the spec travels instead of the institutional memory.

Versioning and the Sampling Loop

Tech packs are living documents. Every sampling round produces comments, and each revision gets a version number and a change log, so the factory sews from the latest page and nobody argues about which spec was current. Photos of the sample annotated against the measurement table make the next round precise, and approvals should be written, not verbal.

Tech packs for custom apparel production are the contract between design intent and factory execution: technical flats and a bill of materials define what gets made, measurement specs with tolerances define what counts as right, construction notes and artwork pages define how, and version control keeps the whole chain honest when staff change or suppliers switch, because tech packs for custom apparel production outlive any single vendor relationship. Brands that write them sample fewer times, launch closer to plan, quote more accurately, and keep quality consistent from the first run to the fiftieth.

Related Articles

Apparel Development Timeline for Custom Brands

Sizing and Fit Charts That Cut POD Returns

How to Compare Print on Demand Suppliers in 2026