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| Decision field | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Free downloadSeamly2DGlobalRemove | Open accessControlled Tech Pack OrientationGlobalRemove | Free downloadbluesign System Partner ListsGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Source production | Check standards |
| Area | Patterns & fit | Patterns & fit | Production | Materials |
| Best for | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Digital pattern drafting | Understanding what a tech pack must control before using a template or releasing work | Starting a bluesign-aligned supplier check |
| 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. | 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. | 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. | Partner status is not a blanket product claim; use the current official list and confirm the exact facility, material, process, or chemical-input scope. |
| Practical access | ||||
| For | Apparel brands | Both | Apparel brands | Apparel brands |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Free download | Open access | Free download |
| Format | Stitch Authority | Software | Stitch Authority | Directory |
| Source type | Stitch Authority | Open-source project | Stitch Authority | Official registry |
| 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 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. | 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. | bluesign publishes current system-partner lists and approved-input references that can support facility, material, chemical, dyeing, and finishing checks. |
| Linked page reviewed | Jul 16, 2026 | Jul 21, 2026 | Jul 16, 2026 | Jul 15, 2026 |
| Next review due | Jul 16, 2027 | Jan 17, 2027 | Jul 16, 2027 | Oct 13, 2026 |
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