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Decision fieldOpen accessSample Review & Approval RecordGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemove
Decision fit
Primary jobSource productionFind patterns & fitChoose materials
AreaProductionPatterns & fitMaterials
Best forApproving a named sample without accidentally approving bulkSearching current and out-of-print sewing patternsTranslating the same fabric mass-per-area result between metric and U.S. customary listings
Know before usingThe record does not validate every size or user, prove bulk conformity, prescribe universal defect classes or AQL, replace testing or inspection, or establish compliance.Community 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 result is a numerical unit conversion, not a new measurement or conformance decision; it does not establish sample or lot representativeness, significant digits, drape, warmth, opacity, thickness, stretch, strength, shrinkage, durability, sewability, end use, target, or tolerance.
Practical access
ForApparel brandsMakersBoth
Location or jurisdictionGlobalGlobalGlobal
AccessOpen accessFree accountOpen access
FormatStitch AuthorityCommunityStitch Authority
Source typeStitch AuthorityCommunity databaseStitch Authority
Source and review
What the source establishesThe record applies version and lot controls from textile testing plus current ISO and ASQ acceptance-sampling boundaries to separate sample approval from bulk release.Threadloop'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 calculator uses the NIST SP 811 Appendix B.8 conversion from avoirdupois ounces per square yard to kilograms per square metre and links to a source-reviewed fabric mass record for method, sampling, conditioning, and product controls.
Linked page reviewedJul 15, 2026Jul 21, 2026Jul 16, 2026
Next review dueJul 15, 2027Jan 17, 2027Jul 16, 2027
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