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Decision fieldFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemoveOpen accessGOTS Certified SuppliersGlobalRemoveOpen accessPattern Test Brief TemplateGlobalRemove
Decision fit
Primary jobFind patterns & fitChoose materialsCheck standardsFind patterns & fit
AreaPatterns & fitMaterialsMaterialsPatterns & fit
Best forSearching current and out-of-print sewing patternsTranslating the same fabric mass-per-area result between metric and U.S. customary listingsChecking GOTS certification recordsPlanning a sewing, knitting, or crochet pattern test
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 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.A company result is not a blanket approval; confirm the certificate scope, validity, facility, process, product, and transaction documentation for the exact purchase.The workflow is not a contract or quality certification; local legal duties and technical review may still apply.
Practical access
ForMakersBothApparel brandsBoth
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessFree accountOpen accessOpen accessOpen access
FormatCommunityStitch AuthorityDirectoryStitch Authority
Source typeCommunity databaseStitch AuthorityOfficial registryStitch 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 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.The official GOTS search exposes certified entities by country, field of operation, product category, and certification detail, including processing and trading scopes.The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface.
Linked page reviewedJul 21, 2026Jul 16, 2026Jul 15, 2026Jul 15, 2026
Next review dueJan 17, 2027Jul 16, 2027Oct 13, 2026Jul 15, 2027
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