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| Decision field | Open accessKnitting Needle to Crochet Hook Size ChartGlobalRemove | Free + paidPattern TestersGlobalRemove | Open accessAIC Find a ProfessionalUnited States · North AmericaRemove |
|---|---|---|---|
| Decision fit | |||
| Primary job | Learn techniques | Find patterns & fit | Repair & conserve |
| Also useful for | No additional job recorded | No additional job recorded | No additional job recorded |
| Area | Yarn | Patterns & fit | Techniques & repair |
| Best for | Finding the current CYC hook and needle aliases that share one known nominal metric diameter before confirming project gauge | Coordinating an independent sewing-pattern test | Finding professional textile or costume conservation help in the United States |
| 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. | The interface and plan description do not prove tester reach, completion, feedback quality, fit validity, export quality, uptime, support, or suitability for an established release process. Measurements and photos can be sensitive personal data. Run a non-critical pilot, review the current privacy and service terms, define consent and photo rights, test exports and deletion, and keep pattern approval and release responsibility with the designer. | The directory is opt-in and excludes qualified people who do not list; designation does not guarantee availability, price, or suitability for a specific object or treatment. |
| Practical access | |||
| For | Makers | Apparel brands | Both |
| Location or jurisdiction | Global | Global | United States · North America |
| Access | Open access | Free + paid | Open access |
| Format | Stitch Authority | Software | Directory |
| Source type | Stitch Authority | First-party platform | Industry organization |
| 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. | Pattern Testers currently offers application intake, tester selection, feedback, photos, approvals, issue tracking, revisions, a reusable tester directory, and release deadlines. The public pricing page shows a limited free plan and paid Pro and Business tiers. Its June 2026 privacy policy lists names, email addresses, measurements, photos, feedback, application history, and assignments among the data processed. | AIC says listed Professional Members complete a peer-reviewed application and may be searched by specialty, material, service, location, or name. |
| Linked page reviewed | Jul 28, 2026 | Jul 21, 2026 | Jul 16, 2026 |
| Next review due | Jul 28, 2027 | Jan 17, 2027 | Jan 12, 2027 |
| Inspect | |||
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