How to Create a Tech Pack for Clothing Manufacturing | Complete Step-by-Step Guide with Real Examples

Before You Start | What You Need to Create a Tech Pack

Before you begin creating your tech pack, gather the necessary materials and tools. You'll need your design sketches or concepts, target market sizing standards, fabric swatches or specifications, color references (Pantone numbers if available), trim ideas, and construction preferences. Having these materials ready streamlines the tech pack creation process and ensures you don't miss critical specifications.

Choose your tech pack creation tool based on your technical skills and budget. Adobe Illustrator is the professional standard - industry designers use it for precision vector drawing. Techpacker.com is a dedicated platform with collaborative features for teams. Canva works for basic tech packs but lacks technical precision. Excel with manual drawings is possible but inefficient. Hiring a freelancer is an option if you lack technical skills. SDF Clothing creates tech packs from your sketches as part of our tech pack service, eliminating the need for you to learn technical design software.

Understand your target market sizing standards before you start. US, UK, and EU sizing differ significantly - what counts as a medium in the US may be a large in the UK. Your size chart must match the market you're selling to. If you're selling internationally, consider creating multiple size charts or using international sizing standards. Our grading service helps create accurate size charts for multiple markets.

Define your quality standards upfront. What AQL level do you require? What defect classifications are unacceptable? What inspection criteria should be applied? These quality standards become part of your tech pack and guide production quality control. Our quality inspection service provides AQL guidance and QC standards for tech pack inclusion.

Step 2 | Build Your Size Chart and Measurement Spec

A complete measurement spec includes point of measure (POM) definitions, measurements for each size in your range, grade rules, and tolerance allowances. Point of measure definitions specify exactly where measurements are taken - a POM diagram uses numbered arrows pointing to measurement locations with a corresponding table explaining each numbered point. This ensures you and the manufacturer measure the same points consistently, preventing fit discrepancies caused by different measurement methods.

Create a measurement table showing measurements for each size in your range. Include body length, chest width, sleeve length, shoulder width, neck width, armhole depth, hem width, and cuff width for tops. For bottoms, include waist, hip, inseam, outseam, rise, thigh, knee, and hem measurements. Specify measurements in centimeters or inches consistently throughout. Add tolerance allowances - typically | 0.5cm or | 0.25in for critical measurements, | 1cm or | 0.5in for less critical measurements.

Grade rules specify how measurements change between sizes. Standard grading rules add approximately 2.5cm (1in) to chest and 2cm (0.75in) to length between sizes for tops. Bottoms typically grade 2.5-3cm (1-1.25in) at waist and hip between sizes. Document your grade rules in the tech pack so manufacturers can produce intermediate sizes correctly. Our grading service creates accurate grade rules for your size range.

Measurement Spec Example | Basic T-Shirt

This table shows a sample measurement spec for a basic t-shirt across standard US sizes. Use this as a template for your own measurement specs.

SDF Clothing provides measurement spec creation as part of our pattern making service. Our pattern makers create accurate measurement specs based on your target market and fit preferences. We also offer fit engineering to optimize measurements for production efficiency and fit consistency across sizes.

Step 4 | Add Colour Specifications

Color specifications use Pantone numbers for accurate color matching. Pantone TPX is the textile industry standard - specify Pantone TPX numbers for all colors in your tech pack. Add color callouts on your technical flat sketches showing exactly where each color is placed. If you don't have Pantone numbers, provide hex codes as an alternative but note that Pantone matching is more accurate for production. Include physical color cards or fabric swatches for visual reference.

Specify whether colors are solid, printed, or yarn-dyed. Solid colors are dyed in the fabric before cutting. Printed colors are applied after garment construction using screen printing or digital printing. Yarn-dyed colors are dyed at the yarn level before weaving or knitting. Each method affects cost, lead time, and production process. Specify the dyeing method in your tech pack to ensure manufacturers use the correct process.

Document color placement clearly. Use callouts on your flats showing where each color is applied. For multi-color garments, specify which parts use which colors. For prints, provide print files showing the print pattern and color breakdown. For yarn-dyed fabrics, specify the color arrangement (e.g., striped, jacquard). Clear color placement prevents production errors where wrong colors are used in wrong areas.

If you need help selecting colors or creating color specifications, SDF Clothing can provide color cards and fabric swatches for approval. Our sampling service includes color matching and dye lot verification. We can also provide lab dip services for custom color development if your brand requires specific brand colors.

Step 6 | Write Construction Notes and Quality Standards

Construction notes specify stitch types, seam allowances, and special construction techniques. Stitch types include overlock (serger) for seam finishing, coverstitch for hems and necklines, lockstitch for topstitching, and zigzag for stretch fabrics. Specify seam allowance - typically 1cm for woven fabrics, 0.7cm for knits. Special construction areas like collar stands, plackets, and pocket placements require detailed notes explaining the construction method.

Quality standards specify AQL level, inspection criteria, and defect classifications. AQL (Acceptable Quality Level) is typically 2.5 for garments, meaning 2.5% of inspected units may have minor defects. Define what constitutes major defects (unacceptable) versus minor defects (acceptable within limits). Our AQL calculator tool helps determine appropriate sample sizes for inspection based on your AQL level.

Document special quality requirements like color fastness standards, shrinkage limits, and strength requirements. Specify any testing required - fabric testing, color fastness testing, dimensional stability testing. These requirements become part of the quality control process during production. Our quality inspection service provides QC standards and testing support.

How to Create a Tech Pack FAQ

Related: tech pack guide, sampling service, pattern making service.