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Decision fieldOpen accessKnitting Needle to Crochet Hook Size ChartGlobalRemoveFree downloadAFIRM Restricted Substances ListGlobalRemoveOpen accessPattern Grading & Size-Run Validation RecordGlobalRemove
Decision fit
Primary jobLearn techniquesCheck standardsFind patterns & fit
Also useful forNo additional job recordedNo additional job recordedNo additional job recorded
AreaYarnStandardsPatterns & fit
Best forFinding the current CYC hook and needle aliases that share one known nominal metric diameter before confirming project gaugeBuilding a product chemical-restriction baselineAuditing inherited grade rules or controlling a new multi-size pattern release from approved targets through sample evidence
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.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
ForMakersApparel brandsApparel brands
Location or jurisdictionGlobalGlobalGlobal
AccessOpen accessFree downloadOpen access
FormatStitch AuthorityReferenceStitch Authority
Source typeStitch AuthorityIndustry organizationStitch Authority
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.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 reviewedJul 28, 2026Jul 21, 2026Jul 27, 2026
Next review dueJul 28, 2027Oct 19, 2026Jul 27, 2027
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