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| Decision field | Free accountThreadloop Sewing Pattern DatabaseGlobalRemove | Open accessYarnSubGlobalRemove | PaidBootstrapFashion SlopersGlobalRemove | Open accessControlled Tech Pack OrientationGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Choose materials | Find patterns & fit | Source production |
| Area | Patterns & fit | Yarn | Patterns & fit | Production |
| Best for | Searching current and out-of-print sewing patterns | Replacing a discontinued or unavailable yarn | Buying a quick measurement-generated sloper | Understanding what a tech pack must control before using a template or releasing work |
| 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. | 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. | Each purchase is an automated draft based on submitted measurements and the chosen product's formula, ease, fabric, and format assumptions. Supported input ranges do not prove fit, and product pages themselves recommend a muslin and additional adjustments for some figures. Confirm included instructions and file compatibility, protect stored body data, and test the output before design or production use. | An orientation rather than a completed product record; it does not supply a universal format, licensed standard content, measurements, tolerances, construction settings, labels, approvals, compliance conclusion, or product-release authority. |
| Practical access | ||||
| For | Makers | Makers | Both | Apparel brands |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Free account | Open access | Paid | Open access |
| Format | Community | Reference | Marketplace | Stitch Authority |
| Source type | Community database | First-party platform | Commercial marketplace | 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. | 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. | BootstrapFashion's current sloper catalogue sells measurement-generated woven and knit blocks. Individual product pages accept body measurements and optional fit adjustments, state supported measurement and height ranges, disclose ease and fabric assumptions, and offer output choices including print-ready PDF and CAD-oriented PLT or DXF, with the generated file sent after purchase. | The guide cites current ISO sources for documented-information, garment-measurement, stitch, and seam boundaries plus current U.S. FTC textile and care-labeling guidance; it explicitly separates those authorities from product-specific technical and market decisions. |
| Linked page reviewed | Jul 21, 2026 | Jul 21, 2026 | Jul 21, 2026 | Jul 16, 2026 |
| Next review due | Jan 17, 2027 | Jan 17, 2027 | Jan 17, 2027 | Jul 16, 2027 |
| Inspect | ||||
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