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| Decision field | Free accountWoolmark Learning CentreGlobalRemove | Open accessYarn Database EU Dyers and MakersEuropean UnionRemove | Open accessPattern Grading & Size-Run Validation RecordGlobalRemove | Open accessSewing Length ConverterGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Learn techniques | Choose materials | 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 | Techniques & repair | Yarn | Patterns & fit | Patterns & fit |
| Best for | Structured wool education | Finding independent EU yarn or fibre dyers with off-Ravelry purchase routes | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Translating a length already stated by a pattern, controlled specification, sewing tool, or seam allowance |
| Know before using | This is Woolmark-operated education focused on wool, not a neutral comparison of all fibres or processing systems. A completion badge records coursework, not independent proof of production competence, product performance, environmental impact, or compliance. Confirm technical values and local requirements against current standards before production use. | It is one curator's intentionally selective, off-Ravelry-oriented database, inventories change, and paid supporters can receive rotating priority placement; verify availability, fibre claims, shipping, and terms directly. | 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. | 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. |
| Practical access | ||||
| For | Both | Makers | Apparel brands | Both |
| Location or jurisdiction | Global | European Union | Global | Global |
| Access | Free account | Open access | Open access | Open access |
| Format | Reference | Directory | Stitch Authority | Stitch Authority |
| Source type | Industry organization | Community database | Stitch Authority | Stitch Authority |
| Source and review | ||||
| What the source establishes | The current Woolmark Learning Centre library publishes free account-based coursework with module counts, completion times, progress tracking, knowledge checks, and supporting resources. Its wool programs cover fibre science, raw-wool and yarn processing, dyeing and finishing, woven textiles, knitwear, product quality, and wastewater management for learners and facilitators. | The individually researched database offers free listings and sortable yarn, fibre, designer, editor, accessory, and location views; the EU page spans multiple countries and direct seller profiles. | 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. | 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. |
| Linked page reviewed | Jul 28, 2026 | Jul 15, 2026 | Jul 27, 2026 | Jul 30, 2026 |
| Next review due | Jan 24, 2027 | Jan 11, 2027 | Jul 27, 2027 | Jul 30, 2027 |
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