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  1. The size of a crochet hook corresponds to specific weights of yarn, and crochet patterns usually list a suggested hook size to help you make the pattern as close to the original design as possible. Yarn labels also list a hook size or range of sizes that are recommended to work with that particular yarn.
    www.crochet.com/learning-center/understanding-cr…

    Yarn Weight & Hook Size Cheat Sheet:

    • Super Fine 1: 2.25—3.5mm
    • Fine 2: 3.5—4.5mm
    • Light 3: 4.5—5.5mm ( Omegacryl and Favorito !)
    • Medium 4: 5.5—6.5mm
    • Bulky 5: 6.5—9mm
    theneonteaparty.com/online-craft-studio/crochet/un…

    SIZES of Crochet Hooks FOR Different YARN WEIGHTS

    • 0 (Lace, thread crochet hooks) = B/1
    • 1 (super fine crochet hooks ) = C/2, D/3
    • 2 (fine crochet hooks) = E/4, F/5
    www.littleyellowwheelbarrow.com/crochet-needle-s…
     
  2. Crochet Hook Sizes Chart (A Free Conversion Guide)

     
  3. Crochet Hook Sizes - Handy Size Chart & The Sizing Facts