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| Decision field | Open accessFreeSewingGlobalRemove | Open accessNMSU Pattern Alteration GuideUnited States · North AmericaRemove | Free accountThreadloop Sewing Pattern DatabaseGlobalRemove | Open accessFabric Mass Unit ConverterGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Find patterns & fit | Choose materials |
| Area | Patterns & fit | Patterns & fit | Patterns & fit | Materials |
| Best for | Custom-fit home sewing patterns | Checking a common flat-pattern alteration method | Searching current and out-of-print sewing patterns | Translating the same fabric mass-per-area result between metric and U.S. customary listings |
| 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. | The guide's general womenswear diagrams and ease ranges are teaching examples, not an individual diagnosis, current commercial-pattern specification, or complete fitting course. A named symptom can have several causes, and alterations may affect adjoining seams, facings, collars, sleeves, balance, and style. Verify the method against the exact pattern and test the coordinated changes on a muslin. | 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 result is a numerical unit conversion, not a new measurement or conformance decision; it does not establish sample or lot representativeness, significant digits, drape, warmth, opacity, thickness, stretch, strength, shrinkage, durability, sewability, end use, target, or tolerance. |
| Practical access | ||||
| For | Makers | Makers | Makers | Both |
| Location or jurisdiction | Global | United States · North America | Global | Global |
| Access | Open access | Open access | Free account | Open access |
| Format | Software | Reference | Community | Stitch Authority |
| Source type | Open-source project | Government guidance | Community database | 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. | New Mexico State University's current Cooperative Extension Guide C-228 explains three alteration methods, folding out fullness, slashing and spreading or overlapping, and redrawing darts or seams. It provides illustrated bodice, sleeve, skirt, and trouser examples and tells readers to compare body measurements plus intended ease with the pattern while preserving grain, design lines, related-piece changes, and comfort ease. | 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 calculator uses the NIST SP 811 Appendix B.8 conversion from avoirdupois ounces per square yard to kilograms per square metre and links to a source-reviewed fabric mass record for method, sampling, conditioning, and product controls. |
| Linked page reviewed | Jul 21, 2026 | Jul 21, 2026 | Jul 21, 2026 | Jul 16, 2026 |
| Next review due | Jan 17, 2027 | Oct 19, 2026 | Jan 17, 2027 | Jul 16, 2027 |
| Inspect | ||||
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