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Decision fieldFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveFree accountFOURSOURCE Supplier NetworkGlobalRemoveOpen accessPattern Test Brief TemplateGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemove
Decision fit
Primary jobFind patterns & fitSource productionFind patterns & fitChoose materials
AreaPatterns & fitProductionPatterns & fitMaterials
Best forSearching current and out-of-print sewing patternsSearching global apparel and textile production capabilitiesPlanning a sewing, knitting, or crochet pattern testTranslating the same fabric mass-per-area result between metric and U.S. customary listings
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 company count is a changing platform claim. Search fields, profiles, certificates, locations, and account access do not independently verify the legal entity, factory ownership, capability, capacity, certificate validity or scope, compliance performance, delivery, or project fit. Confirm the site and subcontracting, credentials with issuers, samples, audits when appropriate, specifications, contracts, and commercial terms.The workflow is not a contract or quality certification; local legal duties and technical review may still apply.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
ForMakersApparel brandsBothBoth
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessFree accountFree accountOpen accessOpen access
FormatCommunityMarketplaceStitch AuthorityStitch Authority
Source typeCommunity databaseCommercial marketplaceStitch AuthorityStitch 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.FOURSOURCE's current public network page presents an operator-reported global company count and country or territory search. It says logged-in users can narrow results by compliance certificates, product groups, fabric types, target groups, minimum order quantities, and other fields, with a free-trial and supplier sign-up route.The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface.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 21, 2026Jul 21, 2026Jul 15, 2026Jul 16, 2026
Next review dueJan 17, 2027Jan 17, 2027Jul 15, 2027Jul 16, 2027
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