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Decision fieldFree downloadbluesign System Partner ListsGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemove
Decision fit
Primary jobCheck standardsChoose materialsFind patterns & fit
AreaMaterialsMaterialsPatterns & fit
Best forStarting a bluesign-aligned supplier checkTranslating the same fabric mass-per-area result between metric and U.S. customary listingsSearching current and out-of-print sewing patterns
Know before usingPartner status is not a blanket product claim; use the current official list and confirm the exact facility, material, process, or chemical-input scope.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.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.
Practical access
ForApparel brandsBothMakers
Location or jurisdictionGlobalGlobalGlobal
AccessFree downloadOpen accessFree account
FormatDirectoryStitch AuthorityCommunity
Source typeOfficial registryStitch AuthorityCommunity database
Source and review
What the source establishesbluesign publishes current system-partner lists and approved-input references that can support facility, material, chemical, dyeing, and finishing checks.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.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.
Linked page reviewedJul 15, 2026Jul 16, 2026Jul 21, 2026
Next review dueOct 13, 2026Jul 16, 2027Jan 17, 2027
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