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| Decision field | Open accessApparel Measurement Tolerance Setting RecordGlobalRemove | Free downloadSeamly2DGlobalRemove | Open accessKnittyGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Source production | Find patterns & fit | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Production | Patterns & fit | Yarn |
| Best for | Turning an inherited or proposed garment tolerance into a controlled POM method, capability study, decision boundary, inspection rule, and change record | Digital pattern drafting | Free editorial knitting patterns and techniques |
| Know before using | The record does not supply universal POM values, validate fit across a population, prove process capability, choose a statistical study or sampling plan, reproduce licensed standards, or replace qualified technical, fit, quality, statistical, safety, compliance, and legal 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. | Free access does not grant commercial reproduction or sale rights; uses beyond one personal copy must be resolved with the designer or author. Knitty says it tries to avoid errors but disclaims responsibility for pattern and technique inaccuracies. Check the live page for corrections, verify gauge and measurements, and confirm permission before any commercial use. |
| Practical access | |||
| For | Apparel brands | Both | Makers |
| Location or jurisdiction | Global | Global | Global |
| Access | Open access | Free download | Open access |
| Format | Stitch Authority | Software | Reference |
| Source type | Stitch Authority | Open-source project | First-party platform |
| Source and review | |||
| What the source establishes | The guide cites current ISO, AATCC, and NIST sources for body and garment measurement boundaries, textile conditioning, dimensional-change testing, repeatability and reproducibility, and AQL-indexed sampling, while requiring the live product owner to set rather than inherit numerical tolerances. | 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. | Knitty currently publishes web-only editorial issues containing original knitting and crochet patterns and articles. Its legal page states that patterns are free for one person's personal use, identifies each designer or author as the copyright holder, and explains that verified pattern corrections are posted in bright pink on the pattern page. |
| Linked page reviewed | Jul 15, 2026 | Jul 21, 2026 | Jul 21, 2026 |
| Next review due | Jul 15, 2027 | Jan 17, 2027 | Jan 17, 2027 |
| Inspect | |||
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