How to Create a Production-Ready Tech Pack: Everything a Manufacturer Needs

A tech pack (short for technical package) is the master design and construction document that tells a manufacturer exactly how to build your garment without ever seeing it in person. It replaces guesswork with precision, communicating every fabric, measurement, construction detail and finishing requirement your factory needs to produce an accurate sample, and eventually, an accurate bulk order.

If you've ever heard a founder say their sample "came back nothing like what we designed", in the vast majority of cases the real problem wasn't the factory, it was an incomplete or unclear tech pack.

In this guide we'll break down exactly what a production-ready tech pack includes, why each component exists, the mistakes that lead to the most costly sampling errors, and how the tech pack actually functions once it lands in a manufacturer's inbox.

What Is a Tech Pack, Exactly?

A tech pack is a document (or more accurately, a collection of documents bound into one file) that contains every technical detail required to manufacture a single garment style. It typically includes technical flat sketches, a bill of materials, a measurement spec sheet, construction notes, colourway information, and label & packaging requirements.

Think of it as the blueprint for your garment. A fashion illustration shows what a design feels like, styled on a model, with creative intent. A tech pack shows exactly how that design is built, unstyled, flat, and dimensionally accurate.

Every professional manufacturer expects one. Some smaller or lower-tier factories will still take on production without one, but this almost always results in a lower quality, less accurate outcome, because the factory is left to fill in the gaps using their own assumptions rather than your specifications.

Why a Tech Pack Is Non-Negotiable, Even for Small Collections

New founders often assume a tech pack is only necessary for large, complex collections, or that it can be skipped in the early stages to save time and money. This is one of the most common and costly misconceptions in garment development.

A tech pack exists to remove ambiguity from the production process. Without one, your manufacturer is left to interpret your vision from reference images, verbal descriptions, or a single physical sample, all of which leave enormous room for error.

The cost of skipping this step is rarely felt immediately, it's felt when the sample arrives. A missing measurement, an unclear stitch detail, or an undefined fabric composition can each result in a sample that has to be entirely redone, adding weeks to your timeline and additional sample fees on top of what you've already paid.

We touched on this in our article on the pros and cons of cut & sew versus print on blank production: poor quality tech packs are one of the leading causes of costly sampling mistakes and extended production timelines. This applies whether you're developing a single graphic tee or a full bespoke outerwear collection.

The Core Components of a Production-Ready Tech Pack

A genuinely production-ready tech pack is made up of several distinct sections, each serving a specific communication purpose. Missing any one of these increases the likelihood of miscommunication during sampling.

1. Cover Page & Style Summary

Every tech pack should open with a clear summary page identifying the style. This includes the style name and style number (a unique reference code your factory will use throughout the production process), the season or collection it belongs to, the date the tech pack was created, and a brief written description of the garment.

This page also usually includes a small overview image or sketch, along with contact information for whoever is managing the development on your side. It sounds minor, but when you're developing multiple styles at once, a clear cover page prevents confusion between similar garments.

2. Technical Flat Sketches

Technical flats (sometimes called CADs or flat sketches) are proportion-accurate line drawings of the garment shown from the front and back, flat, unstyled, with no model, folds, or artistic embellishment.

These are not the same as a fashion illustration. A fashion illustration is designed to sell the emotion and styling of a garment. A technical flat exists purely to communicate construction, and needs to show every visible seam, stitch line, pocket, closure, and design detail accurately.

Any interior construction detail that can't be seen from the outside, such as an internal facing or a hidden pocket bag, should be called out separately with its own close-up sketch and annotation.

3. Bill of Materials (BOM)

The Bill of Materials is a comprehensive list of every physical component used to construct the garment. For each material, the BOM should specify the placement on the garment, the supplier or source (if already confirmed), the material composition and specification, the colour or approved colour code, the quantity or consumption required per garment, and a reference or article number if one exists.

A thorough BOM typically covers the main body fabric, any secondary or contrast fabrics, interfacing or lining, all trims (zips, buttons, drawcords, elastic, eyelets), thread type and colour, all garment labels, and any packaging components such as poly bags, hang tags, or tissue paper.

The BOM is one of the most frequently underdeveloped sections we see from first-time founders. Every component that touches the garment or its packaging needs to be specified here, an undefined trim or an unspecified thread colour is exactly the kind of gap a factory will fill with their own default option, which may not match your brand at all.

4. Point of Measure (POM) Spec Sheet

The POM spec sheet defines every measurement point on the garment, taken flat, and lists the required measurement for each size in your size run, along with an acceptable tolerance.

A point of measure is a fixed landmark on the garment, for example chest width (measured 2.5cm below the armhole), shoulder to shoulder, front length (from High Point Shoulder, commonly abbreviated HPS, to hem), sleeve length, cuff opening, and hem width. Every garment category has its own standard set of points of measure, a t-shirt and a pair of trousers will require entirely different measurement points.

Tolerance refers to the acceptable margin of error for each measurement, commonly expressed as a plus or minus figure in centimetres. Tolerances vary depending on the measurement point, the fabric being used, and the manufacturer's own standards, so this is something to confirm directly with your production partner rather than assume as a fixed rule.

5. Grading Rules

Grading is the process of scaling a garment's pattern up or down across a full size run, based on the measurements confirmed in your POM spec sheet. Your base size (often a size Medium, though this varies by brand) acts as the reference point, and grading rules define exactly how much each measurement point should increase or decrease between each size.

This is a highly technical process typically handled by a pattern maker or grading specialist, but it's worth understanding as a founder because inconsistent grading is a common cause of a size range that fits inconsistently across the range, even when the base sample fits perfectly.

6. Construction & Stitch Detail

This section specifies exactly how the garment should be assembled. It should call out the seam types used in different areas of the garment (such as flatlock, overlock, or coverstitch), stitches per inch (SPI), seam allowance, and any specific finishing techniques such as topstitching, binding, or reinforcement at stress points.

This is also where you'd note any construction detail that separates your garment from a generic version of the same style, unique seam placement, a specific hem finish, or reinforced stitching at high-wear areas are all details that belong here, and are exactly the kind of small details we discussed in our article on what makes a high quality clothing design.

7. Colourways

If your style is being produced in multiple colours, each colourway needs to be listed with its own reference, ideally using an approved lab dip or Pantone (TPX) code rather than a description like "navy", which can be interpreted very differently by different factories and dye houses.

For prints or garments involving colour blocking, this section should also confirm which components of the garment correspond to which colour in each colourway.

8. Artwork, Print & Embellishment Specifications

Any graphic, embroidery, or embellishment detail needs its own dedicated specification. This should include the exact placement, typically measured as a distance down from High Point Shoulder and centred from a defined point, the finished print or embroidery size, the chosen print method (screen print, DTG, embroidery, or another method as covered in our guide to graphic print methods for clothing brands), colour separations or thread colours, and the final high-resolution artwork file itself.

Placement measurements matter enormously here. A design specified as "centred on chest" without an exact measurement will be interpreted differently by every operator on the production line, resulting in an inconsistent placement across your finished units.

9. Trims & Hardware

Beyond what's captured in the BOM, any trim with a functional or branded requirement, such as a custom zip pull, branded button, or specific hardware finish, should be detailed separately with its own close-up sketch, dimensions, and finish specification (for example, matte gold vs polished silver).

10. Garment Labels & Packaging

This section confirms the placement, size, and content of every label required on the garment, including your branded neck label and the required care, fibre content, and country of origin labels we outlined in our article on garment label requirements. It should also specify hang tag placement and any packaging requirements, such as poly bag size, folding method, or specific presentation details.

11. Revision History

A production-ready tech pack is a living document. As samples come back and adjustments are made, the tech pack needs to be updated and clearly versioned, typically labelled V1, V2, V3 and so on, with a date and a brief note describing what changed at each revision.

This might seem like an administrative detail, but it's one of the most important habits to build. Without clear version control, it becomes very easy for a factory to accidentally produce bulk from an outdated version of your spec, particularly if multiple revisions have gone back and forth over email.

Tech Packs for Cut & Sew vs Print on Blank

The depth of tech pack required depends heavily on your production method. If you're developing bespoke cut & sew garments, you'll need a full tech pack covering every section above, since the factory is building the garment from raw fabric and trims with no existing reference point.

If you're working with pre-made blanks and customising them with print or embroidery, your tech pack can be considerably simpler, focused primarily on the artwork and embellishment specification section, along with confirmation of the exact blank style, colour, and size range you're working from. You'll still want to define placement measurements precisely, this is often the section blank decorators get wrong when it isn't specified clearly.

The Most Common Tech Pack Mistakes (And What They Cost You)

Vague or missing measurements. A spec sheet with gaps, or measurements given without a defined point of measure, forces the factory to guess, and guesses rarely match your intended fit.

Describing colours in words rather than codes. "Navy" or "off-white" mean different things to different people and different dye houses. Always reference an approved lab dip or Pantone code wherever possible.

Undefined placement for prints and embroidery. Without an exact measurement from a fixed point, embellishment placement will vary from unit to unit, and often looks noticeably inconsistent once you receive bulk.

Skipping the BOM detail for smaller trims. Thread colour, label placement, and packaging are often left out entirely, leaving the factory to default to whatever they have on hand.

No revision history. Sending updated specs over email without clearly versioning the document creates confusion about which version is current, particularly on longer development timelines with several rounds of sampling.

Each of these mistakes tends to surface at the worst possible time, after a sample has already been produced. For example, resampling a single style because of a missing measurement or an unclear fabric spec typically means paying for another round of sample fees, and adding several weeks back onto your development timeline. The cost of getting the tech pack right the first time is almost always lower than the cost of fixing it after the fact.

Tools You Can Use to Build a Tech Pack

Tech packs can be built using general design and spreadsheet software, dedicated tech pack platforms, or by working with a design and development studio that produces them as part of a broader collection development service.

Adobe Illustrator is the industry standard for the technical flat sketches and artwork layout, paired with a spreadsheet tool (such as Google Sheets or Excel) for the BOM and POM spec sheet. Several dedicated tech pack software platforms also exist, offering built-in templates that combine both functions into a single document.

For founders without a technical design background, working with a studio to develop the tech pack alongside the garment design is usually the more reliable route, particularly for cut & sew collections where the technical accuracy of the pattern and construction details has a direct impact on fit and production cost.

How the Tech Pack Fits Into Sampling & Production

Once your tech pack is complete, it's sent to your chosen manufacturer along with any physical reference materials, such as fabric swatches or a reference garment, if available.

The factory uses the tech pack to produce a first sample, known as a proto or fit sample. This sample is then measured against your POM spec sheet, checked against your construction and material specifications, and reviewed for overall accuracy to the design.

It's rare for a first sample to be entirely correct. Revisions are a normal and expected part of the process, this is exactly why version control matters so much. Each round of feedback should be documented clearly, ideally directly on an updated version of the tech pack, so both you and the factory are always working from the same source of truth.

Once a sample is approved against every point in the tech pack, it becomes the reference standard for quality control during bulk production, tying directly into the checklist process we outlined in our guide on how to perform quality control for your clothing brand.

Frequently Asked Questions

Do I need a tech pack if I'm using print on demand?

Print on demand services typically don't require a tech pack in the traditional sense, since you're working from their existing blank catalogue rather than developing a garment from scratch. You'll still want to clearly define your artwork placement and specifications, but the deeper construction and materials sections aren't usually applicable, which is one of several reasons we generally don't recommend print on demand for brands serious about building a distinct product identity.

Can I create a tech pack without a fashion design background?

The BOM, spec sheet, and written sections can be built by a founder with no design background, provided you're methodical about detail. The technical flat sketches and pattern-related grading rules are more specialised, and are usually best handled by a designer or pattern maker to ensure accuracy.

How many revisions does a tech pack typically go through?

This varies significantly depending on the complexity of the garment and how experienced your development partner is, but it's common for a tech pack to go through two or three revisions between the initial version and final approved sample, particularly for more technical cut & sew styles.

Does every style need its own tech pack?

Yes. Even styles within the same collection that share fabric or trims need their own individual tech pack, since the construction, measurements, and sketches are specific to that garment.

Final Thoughts

A production-ready tech pack is one of the most valuable documents you'll create for your brand, not because it's exciting, but because it's the single biggest factor in whether your finished product actually matches your design vision. Every section exists to remove a specific point of miscommunication between you and your manufacturer, and the founders who take the time to get this right consistently see faster sampling, fewer costly revisions, and a far more consistent final product.

If you're developing your first collection, treat your tech pack as a working document that evolves alongside your samples, not a one-off task to rush through before sending your design off to production.

If you're interested in starting a clothing brand, get in touch with us for a free project consultation where we will guide you through the development process.

Disclaimer : All information in this article is for the purpose of education only, this is not business advice and Rudiment Atelier holds no responsibility or liability for your personal or business decisions.