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Decision fieldOpen accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemoveFree + paidMaker’s RowUnited States · North AmericaRemoveOpen accessFabric Mass Unit ConverterGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemove
Decision fit
Primary jobFind patterns & fitSource productionChoose materialsFind patterns & fit
AreaPatterns & fitProductionMaterialsPatterns & fit
Best forAuditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidenceFinding US production partnersTranslating the same fabric mass-per-area result between metric and U.S. customary listingsSearching current and out-of-print sewing patterns
Know before usingThe record does not create a production grade, supply universal increments or breakpoints, validate a CAD file or fit population, reproduce licensed standards, or replace qualified anthropometric, pattern, technical-design, fit, quality, accessibility, safety, statistical, and user-research review.A factory profile, platform label, bid, estimate, or message does not establish current identity, factory ownership, capability, capacity, workmanship, pricing, compliance, delivery, or project fit. Paid-plan visibility can affect who responds. Verify the production site, subcontracting, references, samples, quality and compliance records, specifications, commercial terms, and remedies directly.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 brandsApparel brandsBothMakers
Location or jurisdictionGlobalUnited States · North AmericaGlobalGlobal
AccessOpen accessFree + paidOpen accessFree account
FormatStitch AuthorityMarketplaceStitch AuthorityCommunity
Source typeStitch AuthorityCommercial marketplaceStitch AuthorityCommunity database
Source and review
What the source establishesThe guide cites current ISO body-table, size-designation, and garment-measurement boundaries plus two peer-reviewed studies that tested the relationship between conventional grade rules, anthropometric evidence, and garment fit; it requires product-specific target deltas and validation instead of publishing universal increments.Maker's Row currently lets a brand submit a project before advance sign-up, then provides access to an account. Its project workflow records product details and files and connects projects with factories by location and specialty. Search guidance lists apparel capabilities such as pattern making, sourcing, sample making, and production. Factory access to bids is plan-dependent.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 16, 2026Jul 21, 2026Jul 16, 2026Jul 21, 2026
Next review dueJul 16, 2027Jan 17, 2027Jul 16, 2027Jan 17, 2027
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