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| Decision field | Open accessSewing Length ConverterGlobalRemove | Open accessPattern Grading & Size-Run Validation RecordGlobalRemove | Open accessYarn Database EU Dyers and MakersEuropean UnionRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Find patterns & fit | Find patterns & fit | Choose materials |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Patterns & fit | Patterns & fit | Yarn |
| Best for | Translating a length already stated by a pattern, controlled specification, sewing tool, or seam allowance | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence | Finding independent EU yarn or fibre dyers with off-Ravelry purchase routes |
| 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 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. | 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. |
| Practical access | |||
| For | Both | Apparel brands | Makers |
| Location or jurisdiction | Global | Global | European Union |
| Access | Open access | Open access | Open access |
| Format | Stitch Authority | Stitch Authority | Directory |
| Source type | Stitch Authority | Stitch Authority | Community database |
| 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 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. | 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. |
| Linked page reviewed | Jul 30, 2026 | Jul 27, 2026 | Jul 15, 2026 |
| Next review due | Jul 30, 2027 | Jul 27, 2027 | Jan 11, 2027 |
| Inspect | |||
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