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Decision fieldFree + paidPattern TestersGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemoveOpen accessControlled Tech Pack OrientationGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemove
Decision fit
Primary jobFind patterns & fitChoose materialsSource productionFind patterns & fit
AreaPatterns & fitMaterialsProductionPatterns & fit
Best forCoordinating an independent sewing-pattern testTranslating the same fabric mass-per-area result between metric and U.S. customary listingsUnderstanding what a tech pack must control before using a template or releasing workSearching current and out-of-print sewing patterns
Know before usingThe interface and plan description do not prove tester reach, completion, feedback quality, fit validity, export quality, uptime, support, or suitability for an established release process. Measurements and photos can be sensitive personal data. Run a non-critical pilot, review the current privacy and service terms, define consent and photo rights, test exports and deletion, and keep pattern approval and release responsibility with the designer.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.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.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 brandsBothApparel brandsMakers
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessFree + paidOpen accessOpen accessFree account
FormatSoftwareStitch AuthorityStitch AuthorityCommunity
Source typeFirst-party platformStitch AuthorityStitch AuthorityCommunity database
Source and review
What the source establishesPattern Testers currently offers application intake, tester selection, feedback, photos, approvals, issue tracking, revisions, a reusable tester directory, and release deadlines. The public pricing page shows a limited free plan and paid Pro and Business tiers. Its June 2026 privacy policy lists names, email addresses, measurements, photos, feedback, application history, and assignments among the data processed.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 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.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 21, 2026Jul 16, 2026Jul 16, 2026Jul 21, 2026
Next review dueJan 17, 2027Jul 16, 2027Jul 16, 2027Jan 17, 2027
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