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Decision fieldOpen accessHook & Needle Diameter ReferenceGlobalRemoveFree accountWoolmark Learning CentreGlobalRemoveFree downloadSeamly2DGlobalRemove
Decision fit
Primary jobLearn techniquesLearn techniquesFind patterns & fit
AreaYarnTechniques & repairPatterns & fit
Best forChecking which U.S. alias the current Craft Yarn Council table gives a known metric package size before confirming project gaugeStructured wool educationDigital pattern drafting
Know before usingThe reference is not a dimensional measurement, manufacturer inspection, UK or Canadian conversion, steel-hook chart, tool recommendation, yarn assignment, gauge result, or proof that a proposed tool will produce the required fabric.This is Woolmark-operated education focused on wool, not a neutral comparison of all fibres or processing systems. A completion badge records coursework, not independent proof of production competence, product performance, environmental impact, or compliance. Confirm technical values and local requirements against current standards before production use.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
ForMakersBothBoth
Location or jurisdictionGlobalGlobalGlobal
AccessOpen accessFree accountFree download
FormatStitch AuthorityReferenceSoftware
Source typeStitch AuthorityIndustry organizationOpen-source project
Source and review
What the source establishesThe lookup reproduces the current public Craft Yarn Council metric and U.S. alias rows and follows the Council's warning that company letter and number labels vary; blank aliases remain blank instead of being inferred.The current Woolmark Learning Centre library publishes free account-based coursework with module counts, completion times, progress tracking, knowledge checks, and supporting resources. Its wool programs cover fibre science, raw-wool and yarn processing, dyeing and finishing, woven textiles, knitwear, product quality, and wastewater management for learners and facilitators.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 reviewedJul 16, 2026Jul 21, 2026Jul 21, 2026
Next review dueJul 16, 2027Jan 17, 2027Jan 17, 2027
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