Just do a google search "crochet hook sizes" mine came up with crochet hook conversion cha… | Knitting needle size chart, Knitting needles, Knitting needles sizes
HIYAHIYA 8'' Double Pointed Stainless Steel Knitting Needles DPN Length 20 Cm / 8 in 1.00 Mm-9.00 Mm / US Size 0 to 13 - Etsy
US Size 7 (4.5mm) Circular Knitting Needles | Stitch & Story
Knitting Needle Sizes and Conversion Chart (Free Printable) - Sheep and Stitch