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| Decision field | Open accessSewing Length ConverterGlobalRemove | Open accessPattern Test Brief TemplateGlobalRemove | Free + paidPattern TestersGlobalRemove | Open accessFreeSewingGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Find patterns & fit | Find patterns & fit | Find patterns & fit | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Patterns & fit | Patterns & fit | Patterns & fit | Patterns & fit |
| Best for | Translating a length already stated by a pattern, controlled specification, sewing tool, or seam allowance | Planning a sewing, knitting, or crochet pattern test | Coordinating an independent sewing-pattern test | Custom-fit home sewing patterns |
| Know before using | This is a length-unit translation reference. It does not identify the measured feature; 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 workflow is not a contract or quality certification; local legal duties and technical review may still apply. | 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. | A generated pattern is not independent fit evidence or a production-ready graded block. The result still depends on accurate measurements, the selected design and options, ease assumptions, fabric behavior, construction, and representative test garments. An account stores saved patterns and measurement sets, so review the platform's privacy terms before retaining personal measurements. |
| Practical access | ||||
| For | Both | Both | Apparel brands | Makers |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Open access | Free + paid | Open access |
| Format | Stitch Authority | Stitch Authority | Software | Software |
| Source type | Stitch Authority | Stitch Authority | First-party platform | Open-source project |
| Source and review | ||||
| What the source establishes | NIST states that 10 millimetres equal 1 centimetre and that one inch is exactly 25.4 millimetres. The tool uses those relationships, 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. | The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface. | 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. | FreeSewing's official documentation says the browser editor drafts a selected design in real time from a measurement set rather than scaling or grading a standard-size pattern. Users can adjust design options and export the generated result, including as PDF; saving the pattern to an account is optional and is used to revisit it later. |
| Linked page reviewed | Jul 30, 2026 | Jul 15, 2026 | Jul 21, 2026 | Jul 21, 2026 |
| Next review due | Jul 30, 2027 | Jul 15, 2027 | Jan 17, 2027 | Jan 17, 2027 |
| Inspect | ||||
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