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Decision fieldOpen accessControlled Tech Pack OrientationGlobalRemovePaidPatternLab LondonGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveFree downloadSeamly2DGlobalRemove
Decision fit
Primary jobSource productionFind patterns & fitFind patterns & fitFind patterns & fit
AreaProductionPatterns & fitPatterns & fitPatterns & fit
Best forUnderstanding what a tech pack must control before using a template or releasing workGenerating an editable custom-measurement blockSearching current and out-of-print sewing patternsDigital pattern drafting
Know before usingAn 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.A measurement-generated draft is a starting block, not independent evidence of body capture, comfort, mobility, balance, garment ease, or production fit. The result depends on measurement accuracy, supported ranges, formula assumptions, selected options, and output handling. Review the service's privacy terms before storing body data and sew a representative toile before design, grading, or production use.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.Patternmaking 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.
Practical access
ForApparel brandsBothMakersBoth
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessOpen accessPaidFree accountFree download
FormatStitch AuthoritySoftwareCommunitySoftware
Source typeStitch AuthorityFirst-party platformCommunity databaseOpen-source project
Source and review
What the source establishesThe 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.PatternLab London's current drafting page says a user creates a measurement profile, selects a basic block or sloper, adjusts fit, dart placement, length, seam allowance, and sleeve options, then downloads the generated result as tiled PDF, AI, or SVG. The live catalogue names bodice, dress, trouser, and stretch blocks and displays a price before purchase.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.The 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.
Linked page reviewedJul 16, 2026Jul 21, 2026Jul 21, 2026Jul 21, 2026
Next review dueJul 16, 2027Jan 17, 2027Jan 17, 2027Jan 17, 2027
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