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Decision fieldFree downloadSeamly2DGlobalRemoveOpen accessPattern Test Brief TemplateGlobalRemoveFree + paidMaker’s RowUnited States · North AmericaRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemove
Decision fit
Primary jobFind patterns & fitFind patterns & fitSource productionFind patterns & fit
AreaPatterns & fitPatterns & fitProductionPatterns & fit
Best forDigital pattern draftingPlanning a sewing, knitting, or crochet pattern testFinding US production partnersSearching current and out-of-print sewing patterns
Know before usingPatternmaking knowledge, controlled measurement files, production conventions, and sewn fit testing are still required. The software does not validate body measurements, ease, balance, grading rules, fabric behavior, construction, or product fit. The project currently labels its user wiki manual as needing updates, so confirm current commands and file behavior against the installed release and active support channels.The workflow is not a contract or quality certification; local legal duties and technical review may still apply.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.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
ForBothBothApparel brandsMakers
Location or jurisdictionGlobalGlobalUnited States · North AmericaGlobal
AccessFree downloadOpen accessFree + paidFree account
FormatSoftwareStitch AuthorityMarketplaceCommunity
Source typeOpen-source projectStitch AuthorityCommercial marketplaceCommunity database
Source and review
What the source establishesThe maintained Seamly2D repository identifies the application as GPLv3+ open-source patternmaking software for Windows, macOS, and Linux. It reads multi-size measurement files for standardized sizes and individual measurement files for custom-fit work, publishes downloadable builds and releases, and links an active website and user forum.The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface.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.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 15, 2026Jul 21, 2026Jul 21, 2026
Next review dueJan 17, 2027Jul 15, 2027Jan 17, 2027Jan 17, 2027
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