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Decision fieldOpen accessKnitting Needle to Crochet Hook Size ChartGlobalRemoveFree downloadAFIRM Restricted Substances ListGlobalRemove
Decision fit
Primary jobLearn techniquesCheck standards
Also useful forNo additional job recordedNo additional job recorded
AreaYarnStandards
Best forFinding the current CYC hook and needle aliases that share one known nominal metric diameter before confirming project gaugeBuilding a product chemical-restriction baseline
Know before usingA 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.
Practical access
ForMakersApparel brands
Location or jurisdictionGlobalGlobal
AccessOpen accessFree download
FormatStitch AuthorityReference
Source typeStitch AuthorityIndustry organization
Source and review
What the source establishesRechecked 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 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.
Linked page reviewedJul 28, 2026Jul 21, 2026
Next review dueJul 28, 2027Oct 19, 2026
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