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Decision fieldFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveOpen accessControlled Tech Pack OrientationGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemove
Decision fit
Primary jobFind patterns & fitSource productionChoose materials
AreaPatterns & fitProductionMaterials
Best forSearching current and out-of-print sewing patternsUnderstanding what a tech pack must control before using a template or releasing workTranslating 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.An orientation rather than a completed product record; it does not supply a universal format, licensed standard content, measurements, tolerances, construction settings, labels, approvals, compliance conclusion, or product-release authority.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 brandsBoth
Location or jurisdictionGlobalGlobalGlobal
AccessFree accountOpen accessOpen access
FormatCommunityStitch AuthorityStitch Authority
Source typeCommunity databaseStitch 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.The guide cites current ISO sources for documented-information, garment-measurement, stitch, and seam boundaries plus current U.S. FTC textile and care-labeling guidance; it explicitly separates those authorities from product-specific technical and market decisions.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 16, 2026Jul 16, 2026
Next review dueJan 17, 2027Jul 16, 2027Jul 16, 2027
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