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| Decision field | Open accessNMSU Pattern Alteration GuideUnited States · North AmericaRemove | Free downloadSeamly2DGlobalRemove | Open accessKnitting Stitch LibraryGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Find patterns & fit | Learn techniques |
| Area | Patterns & fit | Patterns & fit | Techniques & repair |
| Best for | Checking a common flat-pattern alteration method | Digital pattern drafting | Learning or comparing knit structures |
| Know before using | 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. | Patternmaking knowledge, controlled measurement files, production conventions, and sewn fit testing are still required. The software does not validate body measurements, ease, balance, grading rules, fabric behavior, construction, or product fit. The project currently labels its user wiki manual as needing updates, so confirm current commands and file behavior against the installed release and active support channels. | A foundational library, not yet an exhaustive stitch encyclopedia. |
| Practical access | |||
| For | Makers | Both | Makers |
| Location or jurisdiction | United States · North America | Global | Global |
| Access | Open access | Free download | Open access |
| Format | Reference | Software | Stitch Authority |
| Source type | Government guidance | Open-source project | Stitch Authority |
| Source and review | |||
| What the source establishes | 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. | The maintained Seamly2D repository identifies the application as GPLv3+ open-source patternmaking software for Windows, macOS, and Linux. It reads multi-size measurement files for standardized sizes and individual measurement files for custom-fit work, publishes downloadable builds and releases, and links an active website and user forum. | 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 21, 2026 | Jul 15, 2026 |
| Next review due | Oct 19, 2026 | Jan 17, 2027 | Jul 15, 2027 |
| Inspect | |||
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