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| Decision field | Open accessConstruction Classification & Callout Verification RecordGlobalRemove | PaidPatternLab LondonGlobalRemove | Open accessApparel Grade-Rule & Size-Run Validation RecordGlobalRemove | Open accessFreeSewingGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Source production | Find patterns & fit | Find patterns & fit | Find patterns & fit |
| Area | Production | Patterns & fit | Patterns & fit | Patterns & fit |
| Best for | Using construction codes without treating classification as a machine setting, material assignment, supplier translation, or performance guarantee | Generating an editable custom-measurement block | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Custom-fit home sewing patterns |
| Know before using | The record does not reproduce licensed code diagrams, verify a user's proposed code, authorize an ISO and ASTM crosswalk, select a construction, set stitch density or machine settings, prove supplier repeatability or performance, or replace the licensed standards and qualified construction, sewing, production, testing, safety, and quality review. | 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 record does not create a production grade, supply universal increments or breakpoints, validate a CAD file or fit population, reproduce licensed standards, or replace qualified anthropometric, pattern, technical-design, fit, quality, accessibility, safety, statistical, and user-research review. | 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 | Apparel brands | Both | Apparel brands | Makers |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Paid | Open access | Open access |
| Format | Stitch Authority | Software | Stitch Authority | Software |
| Source type | Stitch Authority | First-party platform | Stitch Authority | Open-source project |
| Source and review | ||||
| What the source establishes | The guide cites the current public scopes and statuses of ISO 4915:1991, ISO 4916:1991, and ASTM D6193-16(2025), plus current seam-failure and seam-tensile methods; it keeps classification, translation, complete process definition, physical verification, and performance evidence separate. | 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 guide cites current ISO body-table, size-designation, and garment-measurement boundaries plus two peer-reviewed studies that tested the relationship between conventional grade rules, anthropometric evidence, and garment fit; it requires product-specific target deltas and validation instead of publishing universal increments. | 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 16, 2026 | Jul 21, 2026 | Jul 16, 2026 | Jul 21, 2026 |
| Next review due | Jul 16, 2027 | Jan 17, 2027 | Jul 16, 2027 | Jan 17, 2027 |
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