Amazon.com: 7 Size Crochet Hook Set, 2mm(B)-5mm(H) Ergonomic Crochet Hooks with Transparent Case for Arthritic Hands, Extra Long Crochet Needles, Knitting & Crochet Supplies for Beginners, Comfortable/Easy to Use
Just do a google search "crochet hook sizes" mine came up with crochet hook conversion cha… | Knitting needle size chart, Knitting needles sizes, Knitting needles
What Size Crochet Hook or Knitting Needle for what Ply Yarn? | LoveCrafts