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| Decision field | Open accessKnitting Needle to Crochet Hook Size ChartGlobalRemove | Open accessYarn Database EU Dyers and MakersEuropean UnionRemove | Open accessSeam Allowance ConverterGlobalRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Learn techniques | Choose materials | Find patterns & fit |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Yarn | Yarn | Patterns & fit |
| Best for | Finding the current CYC hook and needle aliases that share one known nominal metric diameter before confirming project gauge | Finding independent EU yarn or fibre dyers with off-Ravelry purchase routes | Translating a seam allowance already stated by a pattern or controlled specification |
| Know before using | A shared nominal diameter does not make a knitting needle and crochet hook interchangeable or predict equal gauge or fabric. The reference is not a physical measurement, manufacturer inspection, UK or Canadian conversion, steel-hook chart, tool recommendation, yarn assignment, or project approval. | 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. | This is a unit-translation reference. It does not 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 | Makers | Makers | Both |
| Location or jurisdiction | Global | European Union | Global |
| Access | Open access | Open access | Open access |
| Format | Stitch Authority | Directory | Stitch Authority |
| Source type | Stitch Authority | Community database | Stitch Authority |
| Source and review | |||
| What the source establishes | Rechecked July 28, 2026. The lookup reproduces the current public Craft Yarn Council metric and U.S. alias rows, aligns hooks and needles only when their nominal millimetre value matches, and leaves missing rows or aliases unfilled. | 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. | NIST states that one inch is exactly 25.4 millimetres, and the SI decimal relationship makes one centimetre equal to 10 millimetres. The tool uses those factors, 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 28, 2026 |
| Next review due | Jul 28, 2027 | Jan 11, 2027 | Jul 28, 2027 |
| Inspect | |||
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