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Decision fieldOpen accessSeam Allowance ConverterGlobalRemoveFree accountThreadloop Sewing Pattern DatabaseGlobalRemoveOpen accessCrochet Stitch LibraryGlobalRemoveOpen accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove
Decision fit
Primary jobFind patterns & fitFind patterns & fitLearn techniquesFind patterns & fit
AreaPatterns & fitPatterns & fitTechniques & repairPatterns & fit
Best forWorking between pattern systemsSearching current and out-of-print sewing patternsLearning or identifying crochet stitchesAuditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence
Know before usingA unit reference; the correct allowance depends on material, seam type, and production method.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.A foundational library, not yet an exhaustive stitch encyclopedia.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.
Practical access
ForBothMakersMakersApparel brands
Location or jurisdictionGlobalGlobalGlobalGlobal
AccessOpen accessFree accountOpen accessOpen access
FormatStitch AuthorityCommunityStitch AuthorityStitch Authority
Source typeStitch AuthorityCommunity databaseStitch AuthorityStitch Authority
Source and review
What the source establishesThe linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface.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 linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface.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.
Linked page reviewedJul 15, 2026Jul 21, 2026Jul 15, 2026Jul 16, 2026
Next review dueJul 15, 2027Jan 17, 2027Jul 15, 2027Jul 16, 2027
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