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| Decision field | Open accessFreeSewingGlobalRemove | Open accessYarnSubGlobalRemove | Open accessConstruction Classification & Callout Verification RecordGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Choose materials | Source production |
| Area | Patterns & fit | Yarn | Production |
| Best for | Custom-fit home sewing patterns | Replacing a discontinued or unavailable yarn | Using construction codes without treating classification as a machine setting, material assignment, supplier translation, or performance guarantee |
| Know before using | A generated pattern is not independent fit evidence or a production-ready graded block. The result still depends on accurate measurements, the selected design and options, ease assumptions, fabric behavior, construction, and representative test garments. An account stores saved patterns and measurement sets, so review the platform's privacy terms before retaining personal measurements. | A suggested match is a data-based shortlist, not proof that the yarn suits the pattern or maker. Yarn records can be incomplete or wrong, prices and availability vary by market, and the site uses affiliate links. Confirm the required gauge, total length, fibre behavior, construction, care, color, dye lot, accessibility, and seller terms, then make and assess a representative swatch before committing. | 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. |
| Practical access | |||
| For | Makers | Makers | Apparel brands |
| Location or jurisdiction | Global | Global | Global |
| Access | Open access | Open access | Open access |
| Format | Software | Reference | Stitch Authority |
| Source type | Open-source project | First-party platform | Stitch Authority |
| Source and review | |||
| What the source establishes | FreeSewing's official documentation says the browser editor drafts a selected design in real time from a measurement set rather than scaling or grading a standard-size pattern. Users can adjust design options and export the generated result, including as PDF; saving the pattern to an account is optional and is used to revisit it later. | YarnSub's official FAQ says its matching software compares gauge, texture, yarn weight and density, fibre content, and fibre qualities such as drape and softness. Discontinued yarns remain searchable as starting points but are excluded from suggested replacements, and each yarn page provides a route to report source-data problems. | 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. |
| Linked page reviewed | Jul 21, 2026 | Jul 21, 2026 | Jul 16, 2026 |
| Next review due | Jan 17, 2027 | Jan 17, 2027 | Jul 16, 2027 |
| Inspect | |||
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