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| Decision field | Open accessKnitting Needle to Crochet Hook Size ChartGlobalRemove | Free downloadAFIRM Restricted Substances ListGlobalRemove | Open accessPattern Test Brief TemplateGlobalRemove | Open accessPattern Grading & Size-Run Validation RecordGlobalRemove |
|---|---|---|---|---|
| Decision fit | ||||
| Primary job | Learn techniques | Check standards | 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 | Yarn | Standards | Patterns & fit | Patterns & fit |
| Best for | Finding the current CYC hook and needle aliases that share one known nominal metric diameter before confirming project gauge | Building a product chemical-restriction baseline | Planning a sewing, knitting, or crochet pattern test | Auditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence |
| 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. | AFIRM states that its list is guidance, not legal advice, an industry standard of care, or a guarantee of completeness or brand acceptance. It does not replace current law, a customer's stricter RSL, manufacturing-input controls, a product-specific risk and sampling plan, accepted laboratory methods, supplier controls, or performance and safety testing. | The workflow is not a contract or quality certification; local legal duties and technical review may still apply. | 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. |
| Practical access | ||||
| For | Makers | Apparel brands | Both | Apparel brands |
| Location or jurisdiction | Global | Global | Global | Global |
| Access | Open access | Free download | Open access | Open access |
| Format | Stitch Authority | Reference | Stitch Authority | Stitch Authority |
| Source type | Stitch Authority | Industry organization | Stitch Authority | 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. | AFIRM's current About page identifies the Apparel and Footwear International RSL Management Group as a member-driven organization collaborating on chemicals management and assigns annual RSL maintenance to its RSL Committee. AFIRM publishes a 2026 multilingual Restricted Substances List for chemicals in finished apparel, footwear, accessories, and related materials, with a material-specific testing matrix. Its FAQ says the list does not cover product-performance testing, distinguishes the finished-product RSL from manufacturing-input lists, and tells suppliers to check each customer's brand-specific requirements and testing acceptance. | The linked tool or guide is maintained inside Stitch Authority and was checked against its current public interface. | 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. |
| Linked page reviewed | Jul 28, 2026 | Jul 30, 2026 | Jul 15, 2026 | Jul 27, 2026 |
| Next review due | Jul 28, 2027 | Oct 28, 2026 | Jul 15, 2027 | Jul 27, 2027 |
| Inspect | ||||
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