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| Decision field | Free accountThreadloop Sewing Pattern DatabaseGlobalRemove | Open accessConstruction Classification & Callout Verification RecordGlobalRemove | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Open accessKnitting Stitch LibraryGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Source production | Find patterns & fit | Learn techniques |
| Area | Patterns & fit | Production | Patterns & fit | Techniques & repair |
| Best for | 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 | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Learning or comparing knit structures |
| Know before using | 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. | 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. | A foundational library, not yet an exhaustive stitch encyclopedia. |
| Practical access | ||||
| For | Makers | Apparel brands | Apparel brands | Makers |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Free account | Open access | Open access | Open access |
| Format | Community | Stitch Authority | Stitch Authority | Stitch Authority |
| Source type | Community database | Stitch Authority | Stitch Authority | Stitch Authority |
| Source and review | ||||
| What the source establishes | 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 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. | The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface. |
| Linked page reviewed | Jul 21, 2026 | Jul 16, 2026 | Jul 16, 2026 | Jul 15, 2026 |
| Next review due | Jan 17, 2027 | Jul 16, 2027 | Jul 16, 2027 | Jul 15, 2027 |
| Inspect | ||||
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