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Decision fieldOpen accessNMSU Pattern Alteration GuideUnited States · North AmericaRemoveOpen accessPattern Test Brief TemplateGlobalRemoveOpen accessFabric Mass Unit ConverterGlobalRemove
Decision fit
Primary jobFind patterns & fitFind patterns & fitChoose materials
Also useful forNo additional job recordedNo additional job recordedNo additional job recorded
AreaPatterns & fitPatterns & fitMaterials
Best forChecking a common flat-pattern alteration methodPlanning a sewing, knitting, or crochet pattern testTranslating the same fabric mass-per-area result between metric and U.S. customary listings
Know before usingThe 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 workflow is not a contract or quality certification; local legal duties and technical review may still apply.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
ForMakersBothBoth
Location or jurisdictionUnited States · North AmericaGlobalGlobal
AccessOpen accessOpen accessOpen access
FormatReferenceStitch AuthorityStitch Authority
Source typeGovernment guidanceStitch AuthorityStitch Authority
Source and review
What the source establishesNew 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 linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface.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 reviewedJul 21, 2026Jul 15, 2026Jul 30, 2026
Next review dueOct 19, 2026Jul 15, 2027Jul 30, 2027
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