A custom sweater tech pack is the main working specification that helps a factory understand what to develop and produce. A tech pack brings the main production information into one controlled document. This includes the design reference, yarn and gauge details, measurements, construction, trims, colors and artwork. When key details are missing or unclear, the factory may need additional confirmation before sampling. The first sample may also need further revision. This guide walks through what to include, common mistakes to avoid, and what to prepare before you send an inquiry.
What a Sweater Tech Pack Should Include
What a Sweater Tech Pack Should IncludeA useful tech pack is more than a photo and a size chart. The sections below cover the information a knitwear factory reviews before development. Each section should be clear enough to avoid unnecessary guesswork.
| Section | What to Include | What Happens If It Is Missing |
|---|---|---|
| Design reference | Front and back flat sketch or clear photo, plus detail shots of neckline, collar, cuff, hem and any logo | The factory may need to infer missing back or detail information. |
| Material spec | Fiber content, yarn count or ply, gauge, colorway | The sample may differ in weight, hand feel or structure. |
| Bill of Materials (BOM) | Main yarn, contrast yarns, buttons, zippers, labels, drawcords, patches, packaging components and other specified materials, with reference codes, colors, sizes or supplier information where available | Components may be sourced or approved separately, making material changes harder to track |
| Measurement spec | Size chart with named measurement points and a tolerance for each point | Inconsistent measurement methods can create fit or measurement discrepancies. |
| Construction details | Stitch structure, rib type, sleeve and neck construction, linking or seaming method | The resulting silhouette or finish may differ from the intended design. |
| Trims and labels | Buttons, zippers, main label, care label, size label and hang tag placement | Late trim decisions may require additional confirmation or sample revision. |
| Color and artwork | Pantone or physical swatch reference, logo placement, size and file format | Color or artwork placement may be interpreted differently from the buyer’s intended standard. |
How to Specify Each Section Correctly
Design Reference
Provide at least a front and back view. For sweaters, the back neck, shoulder seam and hem shape can affect fit and cost. A front-only photo may leave these details unclear. Mark the intended look for any jacquard or intarsia area, and note whether the garment is fully fashioned or cut-and-sew if you know.
Material and Gauge
Name the fiber content and, where possible, the yarn count or ply and the gauge. Saying “soft wool” does not tell the factory which gauge to use. A 7G construction can look and cost very different from a 12G one. Guide to how sweater gauge affects appearance, weight and cost.
Bill of Materials (BOM)
A bill of materials is a controlled list of the materials and components that go into the sweater. It can cover the main yarn, contrast yarns, buttons, zippers, labels, drawcords, patches, packaging components and any other specified material. For each item, include a reference code, color, size or specification, and supplier information where relevant. When a component is approved or changed, update the BOM and version reference together. This keeps the production record accurate and changes traceable through sampling and bulk production.
Measurement Spec and Tolerances
List every measurement point the factory will check and name the reference clearly. Common measurement points may include chest width, body length, sleeve length, shoulder width, neck opening, armhole depth, cuff width and hem measurements. Each point should include a clearly defined measurement method so the buyer and factory measure the garment in the same way. Set tolerances by measurement point rather than using one blanket tolerance for the whole garment. Consider the garment construction, yarn, stitch structure, measurement method and buyer requirements. If your size range is graded, link it to a consistent base size so the factory grades the rest the same way, as described in our sweater size grading guide.
Construction, Trims and Color
Specify the stitch structure — plain jersey, rib, cable, jacquard or intarsia — and the rib type for the neckline, cuffs and hem. State the intended placement for each trim or label. For example, note whether a main label sits at the back neck or a care label sits in the side seam. Include any relevant size, color and finish requirements.
Name any button, zipper or drawcord with its color and finish. For color, use a Pantone reference or an approved physical swatch instead of a color name. Provide logo artwork as a vector file with exact placement and size.
Define placement from a clear garment reference point and state the artwork size or finished motif dimensions so the factory does not have to position the logo by eye. Screen colors are not a reliable production color standard because display conditions vary. Use an agreed textile color standard or approved physical reference where color accuracy matters.
Version Control and Revision Log
A tech pack should carry a clear revision identifier and date. This helps the buyer and factory work from the same controlled version. Record meaningful changes in a short change log, and mark which changes are approved. When a measurement, yarn, trim, artwork or construction detail changes, update the controlled version rather than leaving the change only in email or chat. Reference the sample version each revision applies to, so an obsolete version is not used for later development.
Common Tech Pack Mistakes That Delay Sampling
- No tolerance on measurements. The factory holds a spec it cannot hit and asks questions instead of sampling.
- Unclear measurement points. “Body length” from the high point shoulder and from the center back are different numbers; state which one.
- Front view only. The back, shoulder and neckline details are left to assumption.
- Missing gauge or yarn information. The factory may need to confirm or propose these details before sampling, and the resulting weight, texture or hand feel may differ from the buyer’s expectation if they remain unclear.
- Color by name only. Names such as “navy” or “cream” are open to interpretation, so use an agreed textile color standard or approved physical reference where color accuracy matters.
- No version control. The factory samples an older version while you review a newer one.
- Late trim decisions. Changing a functional button, zipper, drawcord or other construction-sensitive trim may require another review or sample depending on the change.
How a Factory Uses Your Tech Pack
How a Factory Uses Your Tech PackA factory may review different parts of the tech pack in parallel, depending on the style and development process. A typical technical review checks the proposed yarn, gauge, measurements, construction, trims and artwork. The goal is to confirm that the specification is clear enough to begin development. From a manufacturer’s perspective, unclear or conflicting specifications are a common reason additional questions arise before sampling. A well-controlled tech pack helps reduce avoidable clarification and makes revisions easier to trace. If a point is ambiguous, the factory should ask before knitting instead of guessing. Treat that question as a sign that the factory is reviewing the specification carefully.
The sampling stage that follows is covered step by step in our guide to the custom sweater sampling process.
If Your Tech Pack Is Not Complete Yet
You can contact a factory before the tech pack is fully finished. Mark unresolved items clearly as TBC or pending confirmation. This can apply to yarn, gauge, color or trims and helps separate provisional information from approved specifications. If yarn or gauge is still being confirmed, the factory may be able to provide a preliminary or indicative quotation based on the available specification. Final pricing should be reviewed once the material, gauge and other cost-sensitive details are confirmed. For a full list of what to include in a quotation request, see our quote information checklist.
Frequently Asked Questions
What is the minimum information a sweater tech pack needs?
A workable starting point is a front and back design reference, material direction, a measurement chart or size information, stitch or construction requirements, and color references. If the exact yarn count, gauge or trim has not been confirmed, mark it clearly as TBC so the supplier can review or propose an option before sampling. Functional trims or components that affect construction, fit or appearance should be confirmed before the relevant sample is developed. Retail labels and packaging details may sometimes be finalized later, depending on the project and approval stage.
Do I need a tech pack if I only have a photo?
A photo can support an initial review, but additional information is usually needed before accurate sampling. A photo may show silhouette and visible design features, but it does not confirm exact measurements, yarn specification, gauge, reverse-side construction, trims or other production details. A short written spec added to the photo helps fill those gaps and reduces avoidable back-and-forth.
What measurement tolerance is normal for knitwear?
There is no single tolerance that applies to every sweater or every measurement point. Tolerances should be defined by point and agreed according to the yarn, stitch structure, garment construction, measurement method and buyer requirements. Construction-sensitive or smaller measurement points may need different tolerances from larger body measurements.
Can the factory grade my sizes from one base size?
Yes, if you provide a complete measurement chart for one base size and the grade rule or the measurements for each additional size. If you only provide one size with no grade rule, the factory may propose a grading approach for the buyer to review and approve.
How do I keep the tech pack version controlled?
Add a version number and date to the document title, and note every change in a short change log. Use the revision identifier in approval and revision communications, and reference it on relevant sample records so both sides can identify the current version.
What should I send first — a quote request or a full tech pack?
Send a quote request with the size range, quantity and material as soon as you have them, and attach the tech pack when it is ready. The two are linked — a fuller spec at the quote stage gives a more accurate price, which is why the quote information checklist and this tech pack guide work together.
Start your sweater tech pack with HDL. If you are preparing a tech pack for a custom sweater collection, send us your reference image, flat sketch, yarn preference, gauge, size chart with tolerances, color references and target quantity. Our team will review the spec, flag any unclear points before sampling, and come back with a production proposal and quotation. For a closer look at how a sample moves from your sketch to a finished garment, see our sweater sample development guide.
