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| Decision field | Free downloadSeamly2DGlobalRemove | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Open accessCAFTA-DR Textiles and Apparel DirectoryLatin America & CaribbeanRemove | Open accessControlled Tech Pack OrientationGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Source production | Source production |
| Area | Patterns & fit | Patterns & fit | Production | Production |
| Best for | Digital pattern drafting | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Nearshore supplier discovery in the CAFTA-DR region | Understanding what a tech pack must control before using a template or releasing work |
| Know before using | 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. | 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. | Regional inclusion and a company profile do not prove origin eligibility, available capacity, minimums, compliance, workmanship, or commercial fit. | 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. |
| Practical access | ||||
| For | Both | Apparel brands | Apparel brands | Apparel brands |
| Location or jurisdiction | Global | Global | Latin America & Caribbean | Global |
| Access | Free download | Open access | Open access | Open access |
| Format | Software | Stitch Authority | Directory | Stitch Authority |
| Source type | Open-source project | Stitch Authority | First-party platform | Stitch Authority |
| Source and review | ||||
| What the source establishes | 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 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 ConnectAmericas-powered platform exposes a company directory for manufacturers, importers, and input suppliers plus purchasing notices and a knowledge center. | 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. |
| Linked page reviewed | Jul 21, 2026 | Jul 16, 2026 | Jul 15, 2026 | Jul 16, 2026 |
| Next review due | Jan 17, 2027 | Jul 16, 2027 | Jan 11, 2027 | Jul 16, 2027 |
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