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| Decision field | Open accessSeam Allowance ConverterGlobalRemove | Open accessNMSU Pattern Alteration GuideUnited States · North AmericaRemove | Free + paidPatternReviewGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Find patterns & fit | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Patterns & fit | Patterns & fit | Patterns & fit |
| Best for | Translating a seam allowance already stated by a pattern or controlled specification | Checking a common flat-pattern alteration method | Finding member reports about a named sewing pattern |
| Know before using | This is a unit-translation reference. It does not select, approve, or change a seam allowance; establish a universal fraction; interpret an unstated cutting or stitching line; or replace the exact pattern version, controlled specification, material and seam evidence, sample, production method, equipment, tolerance, or release authority. | 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. | PatternReview combines community reports, membership, education, advertising, and retail, so it is not a neutral or complete pattern index. Reviews are individual experiences rather than standardized fit tests. Confirm the exact pattern version, size range, measurements, fabric, format, errata, licence, seller terms, and current availability with the designer or publisher. Paid catalogue and search features do not establish an export route or continued access after membership ends. |
| Practical access | |||
| For | Both | Makers | Makers |
| Location or jurisdiction | Global | United States · North America | Global |
| Access | Open access | Open access | Free + paid |
| Format | Stitch Authority | Reference | Community |
| Source type | Stitch Authority | Government guidance | Community database |
| Account, payment, and exit | |||
| Access scope | Not yet reviewed at this level. | Not yet reviewed at this level. | Sewer reading community pattern reports, participating in discussions, or keeping a personal pattern catalogue and wishlist. |
| Before an account | Not yet reviewed at this level. | Not yet reviewed at this level. | Browse recent pattern reviews, the review gallery, shop, classes, blog, and public help pages without creating an account. |
| Free-account boundary | Not yet reviewed at this level. | Not yet reviewed at this level. | Free membership requires email activation. The account FAQ says most participation and member-only areas require sign-in. |
| Payment boundary | Not yet reviewed at this level. | Not yet reviewed at this level. | Friends of PR costs $34.95 per year and adds advanced search, a personal pattern catalogue and wishlist, bookmarks, classifieds, discounts, and other features. |
| Cancellation or exit | Not yet reviewed at this level. | Not yet reviewed at this level. | Friends of PR recurs on its plan cycle. The account FAQ says an advance email includes cancellation instructions and also publishes an email cancellation route. |
| Saved work and data | Not yet reviewed at this level. | Not yet reviewed at this level. | Paid tools can hold a pattern catalogue, wishlist, bookmarks, and photos, but the checked pages do not establish a complete export or post-membership retention route. Keep critical records elsewhere. |
| Source and review | |||
| What the source establishes | NIST states that one inch is exactly 25.4 millimetres, and the SI decimal relationship makes one centimetre equal to 10 millimetres. The tool uses those factors, displays rounded equivalents, exposes the size difference to the nearest 1/16 inch when converting to inches, and preserves valid value, source-unit, and target-unit state in the URL. | 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. | PatternReview's current site exposes recent pattern, sewing-machine, and store reviews, forums, contests, classes, classifieds, a pattern shop, and a searchable review gallery. Its account FAQ says most participation requires a free activated account. Friends of PR adds advanced search, a personal pattern catalogue and wishlist, bookmarks, classifieds, a photo album, discounts, and other features through a recurring paid membership with a published email cancellation route. |
| Linked page reviewed | Jul 28, 2026 | Jul 21, 2026 | Jul 28, 2026 |
| Next review due | Jul 28, 2027 | Oct 19, 2026 | Jan 24, 2027 |
| Inspect | |||
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