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Decision fieldOpen accessEU VIES VAT Number ValidationEuropean UnionRemoveFree downloadSeamly2DGlobalRemoveOpen accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemove
Decision fit
Primary jobCheck standardsFind patterns & fitFind patterns & fitFind patterns & fit
AreaStandardsPatterns & fitPatterns & fitPatterns & fit
Best forChecking an EU supplier's stated VAT number and saving the dated validation response as one identity and invoicing controlDigital pattern draftingAuditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidenceSearching current and out-of-print sewing patterns
Know before usingA valid VAT number is not proof of manufacturing capability, facility ownership, authorized bank instructions, product origin, tax advice, quality, capacity, certification, labor conditions, or delivery; names and addresses may not be returned for every country, and temporary database outages occur.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.The 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.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 jurisdictionEuropean UnionGlobalGlobalGlobal
AccessOpen accessFree downloadOpen accessFree account
FormatReferenceSoftwareStitch AuthorityCommunity
Source typeOfficial registryOpen-source projectStitch AuthorityCommunity database
Source and review
What the source establishesVIES is the European Commission's online VAT Information Exchange System interface for querying national VAT databases to determine whether a submitted number is valid for intra-EU cross-border trade at the time of the request.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.The 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.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 15, 2026Jul 21, 2026Jul 16, 2026Jul 21, 2026
Next review dueOct 13, 2026Jan 17, 2027Jul 16, 2027Jan 17, 2027
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