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| Decision field | Open accessTech Pack Definition, Contents & LimitsGlobalRemove | Open accessFreeSewingGlobalRemove | PaidPatternLab LondonGlobalRemove | Open accessFabric Mass Unit ConverterGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Source production | Find patterns & fit | Find patterns & fit | Choose materials |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Production | Patterns & fit | Patterns & fit | Materials |
| Best for | Understanding what a tech pack must control before using a template or releasing work | Custom-fit home sewing patterns | Generating an editable custom-measurement block | Translating the same fabric mass-per-area result between metric and U.S. customary listings |
| Know before using | 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. | 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. | A measurement-generated draft is a starting block, not independent evidence of body capture, comfort, mobility, balance, garment ease, or production fit. The result depends on measurement accuracy, supported ranges, formula assumptions, selected options, and output handling. Review the service's privacy terms before storing body data and sew a representative toile before design, grading, or production use. | 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 | ||||
| For | Apparel brands | Makers | Both | Both |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Open access | Paid | Open access |
| Format | Stitch Authority | Software | Software | Stitch Authority |
| Source type | Stitch Authority | Open-source project | First-party platform | Stitch Authority |
| Source and review | ||||
| What the source establishes | The guide cites published ISO sources for documented-information, garment-measurement, stitch, and seam boundaries plus current U.S. FTC textile and care-labeling guidance; it discloses that ISO 10013:2021's 2026 systematic review is at close-of-review stage and separates every cited authority from product-specific technical and market decisions. | 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. | PatternLab London's current drafting page says a user creates a measurement profile, selects a basic block or sloper, adjusts fit, dart placement, length, seam allowance, and sleeve options, then downloads the generated result as tiled PDF, AI, or SVG. The live catalogue names bodice, dress, trouser, and stretch blocks and displays a price before purchase. | 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 reviewed | Jul 27, 2026 | Jul 21, 2026 | Jul 21, 2026 | Jul 30, 2026 |
| Next review due | Jul 27, 2027 | Jan 17, 2027 | Jan 17, 2027 | Jul 30, 2027 |
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