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| Decision field | Open accessHook & Needle Diameter ReferenceGlobalRemove | Free accountThreadloop Sewing Pattern DatabaseGlobalRemove | Open accessConstruction Classification & Callout Verification RecordGlobalRemove | Open accessGOTS Certified SuppliersGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Learn techniques | Find patterns & fit | Source production | Check standards |
| Area | Yarn | Patterns & fit | Production | Materials |
| Best for | Checking which U.S. alias the current Craft Yarn Council table gives a known metric package size before confirming project gauge | Searching current and out-of-print sewing patterns | Using construction codes without treating classification as a machine setting, material assignment, supplier translation, or performance guarantee | Checking GOTS certification records |
| Know before using | The reference is not a dimensional measurement, manufacturer inspection, UK or Canadian conversion, steel-hook chart, tool recommendation, yarn assignment, gauge result, or proof that a proposed tool will produce the required fabric. | 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 code diagrams, verify a user's proposed code, authorize an ISO and ASTM crosswalk, select a construction, set stitch density or machine settings, prove supplier repeatability or performance, or replace the licensed standards and qualified construction, sewing, production, testing, safety, and quality review. | A company result is not a blanket approval; confirm the certificate scope, validity, facility, process, product, and transaction documentation for the exact purchase. |
| Practical access | ||||
| For | Makers | Makers | Apparel brands | Apparel brands |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Free account | Open access | Open access |
| Format | Stitch Authority | Community | Stitch Authority | Directory |
| Source type | Stitch Authority | Community database | Stitch Authority | Official registry |
| Source and review | ||||
| What the source establishes | The lookup reproduces the current public Craft Yarn Council metric and U.S. alias rows and follows the Council's warning that company letter and number labels vary; blank aliases remain blank instead of being inferred. | 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 guide cites the current public scopes and statuses of ISO 4915:1991, ISO 4916:1991, and ASTM D6193-16(2025), plus current seam-failure and seam-tensile methods; it keeps classification, translation, complete process definition, physical verification, and performance evidence separate. | The official GOTS search exposes certified entities by country, field of operation, product category, and certification detail, including processing and trading scopes. |
| Linked page reviewed | Jul 16, 2026 | Jul 21, 2026 | Jul 16, 2026 | Jul 15, 2026 |
| Next review due | Jul 16, 2027 | Jan 17, 2027 | Jul 16, 2027 | Oct 13, 2026 |
| Inspect | ||||
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