How to Make a Tech Pack for Clothing

A tech pack — short for technical package — is a comprehensive document that communicates every detail of a garment to a manufacturer. Think of it as the blueprint for your clothing. Just as an architect would never hand a construction crew a napkin sketch and say “build this,” you should never send a factory a mood board and expect a usable sample.

A tech pack typically runs 8 to 25 pages and includes flat sketches, a bill of materials, a detailed size chart, construction specifications, color references, artwork placement instructions, and packaging guidelines. Every element exists because manufacturers have encountered the ambiguity that arises without it.

Manufacturers require tech packs for three reasons. First, they need to accurately cost your garment. Without knowing the exact materials, construction complexity, and trim requirements, a factory cannot give you a reliable price quote. Second, the pattern maker needs precise measurements and construction details to draft a pattern. Third, the production floor needs a reference document for quality control — something to measure finished garments against.

What happens without a tech pack? In the best case, your factory asks dozens of questions over email over several weeks, delaying your timeline. In the worst case, they make assumptions. They choose a cheaper fabric weight because you did not specify GSM. They use a basic overlock seam where you wanted a flat-felled seam. They attach the label at center back neck when you wanted it at the left side seam. You receive a sample that looks vaguely like your design but feels wrong in every detail. You pay for revisions. You lose weeks. Some brands lose entire seasons to this cycle.

The traditional path to creating a tech pack involves hiring a freelance technical designer or working with a product development agency. Here is what that looks like in terms of real costs and timelines.

A freelance technical designer typically works from your sketches, reference images, and verbal descriptions. They create the flat sketches in Adobe Illustrator, build the measurement charts in Excel, and compile everything into a PDF. The process involves multiple rounds of feedback: you review the first draft, request changes to measurements or construction details, wait for revisions, and repeat until the tech pack is approved.

For a brand launching a 10-piece collection, the tech pack cost alone ranges from $1,500 to $5,000. Add the time cost — 2 to 4 weeks of calendar time before you can even submit to factories for quoting — and the traditional process becomes a significant bottleneck for small and medium-sized brands operating on tight timelines and tighter budgets.

Product development agencies offer more comprehensive services (they handle sourcing and sampling too) but charge $500 to $2,000 per style for tech pack creation as part of their development fee. This option makes sense for brands with budget but not expertise, though it creates dependency on an external partner for every new style.

Smasher Studio pairs a fashion-trained AI orchestrator with a team of professional pattern makers. The AI handles the design work, and humans build the production documents. Here is how it works.

You describe your garment in natural language. Not in technical jargon — in plain English. You might say “an oversized boxy-fit hoodie in 400 GSM French terry, sand colorway, with a kangaroo pocket, ribbed cuffs and hem, and a woven label at center back neck.” The AI generates photoreal images of the piece in seconds so you can refine the silhouette, fabric, and details until the design matches your vision.

When the design is ready, you order directly from the conversation. A professional pattern maker cuts a production AAMA/ASTM DXF-2 cutting pattern from your design. Delivery takes as little as 48 hours and costs $29 to $129 per garment. The full factory tech pack, with flat views, a detailed BOM with fabric composition and trim specifications, a size chart with POMs, construction details appropriate for the specified fabric, and color specifications, is a $10 add-on, and grading, marker layout and seam allowances are available as add-ons too, compared with $150 to $500 for the spec document alone from a freelancer.

Because the tech pack add-on and the cutting pattern are authored together by the same pattern maker, the specification document and the production files never contradict each other — a common and costly failure point when they come from different freelancers. You get manufacturer-ready documents for first samples, factory quoting, and small-batch production, with professional expertise already in the loop.

Below is the page structure of a well-organized tech pack. While the exact number of pages varies by garment complexity, this template covers the standard layout that most manufacturers expect.

Understanding how factories use tech packs helps you create better ones. Your tech pack passes through at least four different departments, and each one extracts different information from it.

The bottom line: your tech pack is not just a document for getting quotes. It is a living reference that follows your garment through every stage of production. The more precise and complete it is, the fewer questions arise on the factory floor, the fewer mistakes are made, and the faster you get from concept to finished product.