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| Decision field | Open accessNMSU Pattern Alteration GuideUnited States · North AmericaRemove | Open accessWRAP Certified FacilitiesGlobalRemove | Open accessGOTS Certified SuppliersGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Check standards | Check standards |
| Area | Patterns & fit | Production | Materials |
| Best for | Checking a common flat-pattern alteration method | Checking a named facility's current WRAP certification or discovering listed production units | Checking GOTS certification records |
| 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 public map is opt-in and certification applies to an individual production unit; it does not establish product quality, capacity, availability, upstream coverage, or whole-chain performance. | A company result is not a blanket approval; confirm the certificate scope, validity, facility, process, product, and transaction documentation for the exact purchase. |
| Practical access | |||
| For | Makers | Apparel brands | Apparel brands |
| Location or jurisdiction | United States · North America | Global | Global |
| Access | Open access | Open access | Open access |
| Format | Reference | Directory | Directory |
| Source type | Government guidance | Official registry | Official registry |
| 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. | WRAP states that the map contains current certified production units worldwide and supports manufacturer discovery across apparel, footwear, sewn and leather goods, and textiles. | The official GOTS search exposes certified entities by country, field of operation, product category, and certification detail, including processing and trading scopes. |
| Linked page reviewed | Jul 21, 2026 | Jul 15, 2026 | Jul 15, 2026 |
| Next review due | Oct 19, 2026 | Oct 13, 2026 | Oct 13, 2026 |
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