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| Decision field | Open accessSeam Allowance ConverterGlobalRemove | Open accessNMSU Pattern Alteration GuideUnited States · North AmericaRemove | Open accessControlled Tech Pack OrientationGlobalRemove | Open accessHook & Needle Diameter ReferenceGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Source production | Learn techniques |
| Area | Patterns & fit | Patterns & fit | Production | Yarn |
| Best for | Working between pattern systems | Checking a common flat-pattern alteration method | Understanding what a tech pack must control before using a template or releasing work | Checking which U.S. alias the current Craft Yarn Council table gives a known metric package size before confirming project gauge |
| Know before using | A unit reference; the correct allowance depends on material, seam type, and production method. | 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. | 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. | The reference is not a dimensional measurement, manufacturer inspection, UK or Canadian conversion, steel-hook chart, tool recommendation, yarn assignment, gauge result, or proof that a proposed tool will produce the required fabric. |
| Practical access | ||||
| For | Both | Makers | Apparel brands | Makers |
| Location or jurisdiction | Global | United States · North America | Global | Global |
| Access | Open access | Open access | Open access | Open access |
| Format | Stitch Authority | Reference | Stitch Authority | Stitch Authority |
| Source type | Stitch Authority | Government guidance | Stitch Authority | Stitch Authority |
| Source and review | ||||
| What the source establishes | The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface. | 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 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. | The lookup reproduces the current public Craft Yarn Council metric and U.S. alias rows and follows the Council's warning that company letter and number labels vary; blank aliases remain blank instead of being inferred. |
| Linked page reviewed | Jul 15, 2026 | Jul 21, 2026 | Jul 16, 2026 | Jul 16, 2026 |
| Next review due | Jul 15, 2027 | Oct 19, 2026 | Jul 16, 2027 | Jul 16, 2027 |
| Inspect | ||||
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