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| Decision field | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Open accessKnitting Stitch LibraryGlobalRemove | Free accountThreadloop Sewing Pattern DatabaseGlobalRemove | Open accessHook & Needle Diameter ReferenceGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Learn techniques | Find patterns & fit | Learn techniques |
| Area | Patterns & fit | Techniques & repair | Patterns & fit | Yarn |
| Best for | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Learning or comparing knit structures | Searching current and out-of-print sewing patterns | Checking which U.S. alias the current Craft Yarn Council table gives a known metric package size before confirming project gauge |
| Know before using | 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. | 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 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. |
| Practical access | ||||
| For | Apparel brands | Makers | Makers | Makers |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Open access | Free account | Open access |
| Format | Stitch Authority | Stitch Authority | Community | Stitch Authority |
| Source type | Stitch Authority | Stitch Authority | Community database | Stitch Authority |
| Source and review | ||||
| What the source establishes | 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. | 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 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. |
| Linked page reviewed | Jul 16, 2026 | Jul 15, 2026 | Jul 21, 2026 | Jul 16, 2026 |
| Next review due | Jul 16, 2027 | Jul 15, 2027 | Jan 17, 2027 | Jul 16, 2027 |
| Inspect | ||||
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