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| Decision field | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Free + paidTextile Museum of Canada Learning HubCanada · North AmericaRemove | Free downloadSeamly2DGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Learn techniques | Find patterns & fit |
| Area | Patterns & fit | Techniques & repair | Patterns & fit |
| Best for | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Exploring textile techniques and textile care through a national museum public programs, recorded workshops, and self-directed online resources | 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. | This is a museum learning hub, not a structured technique curriculum, a qualification, a certification, a practitioner directory, or proof of skill. In-person and scheduled programs may be ticketed, time-limited, or Toronto-based, and recorded content and online resources vary in depth and topic. Confirm the current program schedule, access, cost, format, and topic coverage before relying on it for a specific technique. | 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 | Makers | Both |
| Location or jurisdiction | Global | Canada · North America | Global |
| Access | Open access | Free + paid | Free download |
| Format | Stitch Authority | Reference | Software |
| Source type | Stitch Authority | First-party platform | 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 Textile Museum of Canada, a national institution in Toronto supported by public arts funders including the Canada Council for the Arts and the Government of Canada, states on its learning page that it supports lifelong learning through public programs, including hybrid online and in-person workshops, artist talks, and tours, an archive of recorded programs and workshops, education guides tied to exhibitions, and a caring-for-your-textiles conservation section with curated resources. The museum also facilitates workshops at Toronto Public Library branches and through a Community Makers program. | 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 17, 2026 | Jul 21, 2026 |
| Next review due | Jul 16, 2027 | Jan 13, 2027 | Jan 17, 2027 |
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