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| Decision field | Open accessNMSU Pattern Alteration GuideUnited States · North AmericaRemove | Open accessYarn Substitution PlannerGlobalRemove | Free + paidPattern TestersGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Choose materials | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Patterns & fit | Yarn | Patterns & fit |
| Best for | Checking a common flat-pattern alteration method | Turning a known project length and candidate package size into a transparent buying estimate while keeping specimen, finished-fabric, care, and supply decisions separate | Coordinating an independent sewing-pattern test |
| 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. | The tool does not verify label values, convert between metres and yards, identify fibre or yarn diameter, assign a yarn-weight category, predict gauge or fabric, prescribe reserve, guarantee required quantity, check dye-lot supply, score candidates, or approve a substitution. A representative treated specimen and project-specific fabric, care, wear, comfort, supply, and quantity review remain required. | The interface and plan description do not prove tester reach, completion, feedback quality, fit validity, export quality, uptime, support, or suitability for an established release process. Measurements and photos can be sensitive personal data. Run a non-critical pilot, review the current privacy and service terms, define consent and photo rights, test exports and deletion, and keep pattern approval and release responsibility with the designer. |
| Practical access | |||
| For | Makers | Makers | Apparel brands |
| Location or jurisdiction | United States · North America | Global | Global |
| Access | Open access | Open access | Free + paid |
| Format | Reference | Stitch Authority | Software |
| Source type | Government guidance | Stitch Authority | First-party platform |
| 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 planner performs visible arithmetic only on user-entered project length, reserve, package length, package mass, and price. Its connected source-reviewed guide cites the current Craft Yarn Council category, FAQ, WPI, and hook-and-needle guidance plus ASTM and ISO linear-density sources, and explicitly separates label comparison from substitution approval. | Pattern Testers currently offers application intake, tester selection, feedback, photos, approvals, issue tracking, revisions, a reusable tester directory, and release deadlines. The public pricing page shows a limited free plan and paid Pro and Business tiers. Its June 2026 privacy policy lists names, email addresses, measurements, photos, feedback, application history, and assignments among the data processed. |
| Linked page reviewed | Jul 21, 2026 | Jul 16, 2026 | Jul 21, 2026 |
| Next review due | Oct 19, 2026 | Jul 16, 2027 | Jan 17, 2027 |
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