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| Decision field | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Open accessControlled Tech Pack OrientationGlobalRemove | Free downloadSeamly2DGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Source production | Find patterns & fit |
| Area | Patterns & fit | Production | Patterns & fit |
| Best for | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Understanding what a tech pack must control before using a template or releasing work | Digital pattern drafting |
| Know before using | The record does not create a production grade, supply universal increments or breakpoints, validate a CAD file or fit population, reproduce licensed standards, or replace qualified anthropometric, pattern, technical-design, fit, quality, accessibility, safety, statistical, and user-research review. | An orientation rather than a completed product record; it does not supply a universal format, licensed standard content, measurements, tolerances, construction settings, labels, approvals, compliance conclusion, or product-release authority. | Patternmaking knowledge, controlled measurement files, production conventions, and sewn fit testing are still required. The software does not validate body measurements, ease, balance, grading rules, fabric behavior, construction, or product fit. The project currently labels its user wiki manual as needing updates, so confirm current commands and file behavior against the installed release and active support channels. |
| Practical access | |||
| For | Apparel brands | Apparel brands | Both |
| Location or jurisdiction | Global | Global | Global |
| Access | Open access | Open access | Free download |
| Format | Stitch Authority | Stitch Authority | Software |
| Source type | Stitch Authority | Stitch Authority | Open-source project |
| Source and review | |||
| What the source establishes | The guide cites current ISO body-table, size-designation, and garment-measurement boundaries plus two peer-reviewed studies that tested the relationship between conventional grade rules, anthropometric evidence, and garment fit; it requires product-specific target deltas and validation instead of publishing universal increments. | The guide cites current ISO sources for documented-information, garment-measurement, stitch, and seam boundaries plus current U.S. FTC textile and care-labeling guidance; it explicitly separates those authorities from product-specific technical and market decisions. | The maintained Seamly2D repository identifies the application as GPLv3+ open-source patternmaking software for Windows, macOS, and Linux. It reads multi-size measurement files for standardized sizes and individual measurement files for custom-fit work, publishes downloadable builds and releases, and links an active website and user forum. |
| Linked page reviewed | Jul 16, 2026 | Jul 16, 2026 | Jul 21, 2026 |
| Next review due | Jul 16, 2027 | Jul 16, 2027 | Jan 17, 2027 |
| Inspect | |||
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