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Side-by-side evidence and decision metadata for selected textile resources.
Decision fieldFree downloadSeamly2DGlobalRemovePaidPatternLab LondonGlobalRemoveFree + paidThreadloop Sewing Pattern DatabaseGlobalRemoveOpen accessGarment POM Definition & Verification RecordGlobalRemove
Decision fit
Primary jobFind patterns & fitFind patterns & fitFind patterns & fitSource production
Also useful forNo additional job recordedNo additional job recordedNo additional job recordedNo additional job recorded
AreaPatterns & fitPatterns & fitPatterns & fitProduction
Best forDigital pattern draftingGenerating an editable custom-measurement blockSearching current and out-of-print sewing patternsTurning an ambiguous POM name, code, or diagram into a reproducible method before setting targets, tolerances, or inspection decisions
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.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.The record does not reproduce licensed ISO measurement drawings, supply universal POM codes or targets, approve an internal method, prove measurement capability or product fit, or replace qualified technical-design, pattern, fit, quality, metrology, safety, and regulatory review.
Practical access
ForBothBothMakersApparel brands
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessFree downloadPaidFree + paidOpen access
FormatSoftwareSoftwareCommunityStitch Authority
Source typeOpen-source projectFirst-party platformCommunity databaseStitch Authority
Account, payment, and exit
Access scopeNot yet reviewed at this level.Not yet reviewed at this level.Sewer searching pattern records or organizing patterns, projects, fabric, notions, and private files.Not yet reviewed at this level.
Before an accountNot yet reviewed at this level.Not yet reviewed at this level.Browse the pattern database, guide, designers, publications, and public community areas without creating an account.Not yet reviewed at this level.
Free-account boundaryNot yet reviewed at this level.Not yet reviewed at this level.A free account needs no card and supports a stash, wishlist, projects, reviews, and personal organization.Not yet reviewed at this level.
Payment boundaryNot yet reviewed at this level.Not yet reviewed at this level.Plus adds PDF pattern storage, collections, saved searches, bulk editing, and other workflow features on monthly or annual billing.Not yet reviewed at this level.
Cancellation or exitNot yet reviewed at this level.Not yet reviewed at this level.Cancel through an in-account link. Paid features remain through the current billing cycle, then the account returns to free features.Not yet reviewed at this level.
Saved work and dataNot yet reviewed at this level.Not yet reviewed at this level.The terms say submitted materials remain yours, but the checked public pages do not explain a full export or how stored PDFs behave after downgrade. Keep originals outside the platform.Not yet reviewed at this level.
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.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. Current terms state that the free plan requires no card, paid upgrades start billing immediately, cancellation retains paid features through the current cycle, and the account then returns to free features.The guide cites current ISO garment-measurement, body-measurement, and textile-conditioning standards plus NIST measurement-process guidance for repeatability and reproducibility; it requires organization-specific codes, added points, targets, and tolerances to remain explicitly controlled.
Linked page reviewedJul 21, 2026Jul 21, 2026Jul 28, 2026Jul 16, 2026
Next review dueJan 17, 2027Jan 17, 2027Jan 24, 2027Jul 16, 2027
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