A tech pack is the working specification that connects a garment idea to development and production. It should let different people understand the same product without relying on memory or guesswork. Attractive presentation helps, but accuracy, completeness, and version control matter more than a polished cover.
You can begin with a simple document and improve it as decisions become final. The important distinction is between information that is proposed, information that has been tested, and information approved for bulk. A production team should never need to infer which of three conflicting measurements is current.
Give the style a clear identity
Start with a unique style code, product name, season or collection, date, revision number, and responsible contact. Include the intended customer and use when they affect construction. Keep filenames consistent so the latest document is identifiable without opening every attachment.
Create an approval log showing what changed, who approved it, and when. If a sleeve measurement changes after a fit review, record the revision in the measurement table and the change log. Do not leave the correction only in an email while the main document still shows the old value.
Draw the garment, not just the mood
Provide clean front and back technical views. Add close-up drawings for details that are difficult to understand from the main view, such as a pocket opening, concealed fastening, lining attachment, or internal label. Identify seam lines and component placement where relevant.
A photograph can support a construction reference, but it should not replace your own specification. Mark exactly which feature the reference illustrates and which features should not be copied. Distinguish decorative topstitching from structural seams so visual shorthand does not become a manufacturing assumption.
Build the bill of materials
List the main fabric, secondary fabrics, linings, interlinings, elastics, zippers, buttons, thread, labels, and packaging. Include the information needed to identify each item: composition, construction, weight where relevant, color reference, dimensions, finish, and supplier code if known.
Use separate entries for similar components that are not interchangeable. A waistband elastic and a shoulder elastic may behave differently even if they look alike. Mark proposed substitutions as requiring approval. The bill of materials should match the components used in the final reference sample.
Define points of measure
A measurement name is not always enough. Show where the tape starts and ends, whether the garment lies flat, and whether the measurement is straight, curved, relaxed, or stretched. Use diagrams for points that are likely to be interpreted differently.
State the units consistently. Provide the base-size target, agreed tolerances, and a column for actual sample measurements. Body measurements, finished garment measurements, and pattern dimensions serve different purposes. Label them clearly rather than combining them in one unexplained size chart.
For example, a flat waist measurement and a full waist circumference are related but not identical entries. An instruction to “add two” is unusable unless the unit and measurement basis are clear. Precision here prevents revisions caused by interpretation rather than design.
Explain construction and finishing
Identify seam types, visible stitch requirements, reinforcement points, hems, pocket attachment, and fastening details. Where a specific method is essential, describe it or supply an annotated example. Where the manufacturer may propose a suitable method, make that flexibility explicit.
Include pressing, washing, brushing, or other finishing intentions. Processes can affect dimensions, color, and hand feel, so specify whether measurements are checked before or after the intended treatment. Avoid writing a technical process requirement you do not understand; ask the development team to review it.
Specify decoration and labels
Provide production-ready artwork separately from the document preview. State the artwork version, size, colors, orientation, placement reference, and intended decoration method. Show whether artwork dimensions remain constant across sizes or change according to a separate rule.
Add brand labels, care information, size identification, hangtags, and barcode requirements where applicable. The content of regulatory labels must be verified for the destination and actual material composition. An attractive label design is not proof that its wording is correct.
Add grading and packing instructions
A base-size approval does not automatically approve the entire size range. Define the intended sizes and agree the grading approach with a qualified pattern professional. Review selected sizes physically when needed, especially when the range extends beyond the assumptions of the original block.
Packing instructions should identify fold method, unit packaging, size stickers, assortment, and carton requirements. If a marketplace or retailer has its own manual, reference the current version and identify who supplies final label files. Keep changing shipment instructions separate from stable garment specifications.
Use the tech pack during sampling
Record sample measurements and fit comments directly against the relevant requirement. Classify each observation as an error against the specification, a proposed design change, or a question requiring investigation. That prevents a new preference from being mistaken for a production defect.
Before bulk release, reconcile the document with the approved sample. Check that artwork, labels, components, and measurements all refer to the same revision. Keep the released version archived, and treat later changes as controlled amendments with potential cost and schedule consequences.
Key Takeaways
- A tech pack is a controlled working specification, not merely a drawing.
- Identify the style, revision, materials, measurements, construction, and artwork.
- Explain how measurements are taken and keep units consistent.
- Separate sample observations from approved production requirements.
- Release one reconciled document and preserve its approval history.
Turn your references into a production brief
Use Knapmod’s design and development service to discuss the technical work your garment needs. Share existing sketches, samples, and measurement ideas so we can identify missing information and plan an efficient, precise development process.
Knowledge is the starting point.
A clear brief is the next step.