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Decision fieldFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveOpen accessConstruction Classification & Callout Verification RecordGlobalRemoveOpen accessFreeSewingGlobalRemoveOpen accessHook & Needle Diameter ReferenceGlobalRemove
Decision fit
Primary jobFind patterns & fitSource productionFind patterns & fitLearn techniques
AreaPatterns & fitProductionPatterns & fitYarn
Best forSearching current and out-of-print sewing patternsUsing construction codes without treating classification as a machine setting, material assignment, supplier translation, or performance guaranteeCustom-fit home sewing patternsChecking which U.S. alias the current Craft Yarn Council table gives a known metric package size before confirming project gauge
Know before usingCommunity members add and quality-control the records, so confirm sizing, measurements, fabric suggestions, format, availability, errata, license, and purchase terms with the designer or publisher. Adding an entry to a stash does not provide the pattern files. Saved searches and private PDF storage are paid Plus features, and a listing or review does not establish pattern accuracy or fit.The record does not reproduce licensed code diagrams, verify a user's proposed code, authorize an ISO and ASTM crosswalk, select a construction, set stitch density or machine settings, prove supplier repeatability or performance, or replace the licensed standards and qualified construction, sewing, production, testing, safety, and quality review.A generated pattern is not independent fit evidence or a production-ready graded block. The result still depends on accurate measurements, the selected design and options, ease assumptions, fabric behavior, construction, and representative test garments. An account stores saved patterns and measurement sets, so review the platform's privacy terms before retaining personal measurements.The 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.
Practical access
ForMakersApparel brandsMakersMakers
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessFree accountOpen accessOpen accessOpen access
FormatCommunityStitch AuthoritySoftwareStitch Authority
Source typeCommunity databaseStitch AuthorityOpen-source projectStitch Authority
Source and review
What the source establishesThreadloop's official guide describes an independent, fully crowdsourced database covering available and out-of-print sewing patterns. Its search supports pattern type, fabric type, age group, body type, cup size, level, format, file features, language, measurements, availability, and other filters; members can also track a stash, wishlist, projects, reviews, and discussions.The guide cites the current public scopes and statuses of ISO 4915:1991, ISO 4916:1991, and ASTM D6193-16(2025), plus current seam-failure and seam-tensile methods; it keeps classification, translation, complete process definition, physical verification, and performance evidence separate.FreeSewing's official documentation says the browser editor drafts a selected design in real time from a measurement set rather than scaling or grading a standard-size pattern. Users can adjust design options and export the generated result, including as PDF; saving the pattern to an account is optional and is used to revisit it later.The 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.
Linked page reviewedJul 21, 2026Jul 16, 2026Jul 21, 2026Jul 16, 2026
Next review dueJan 17, 2027Jul 16, 2027Jan 17, 2027Jul 16, 2027
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