When you are using a pattern that mentions a specific needle or hook, you will need a handy size conversion chart for knitting needles and crochet hooks!
Crochet Hook Sizes and Comparison Chart - Sarah Maker
Knitting needle and crochet hook size charts
UK vs. US Knitting Terms, Yarn Weights and Needle Sizes - Little
Crochet Hook Conversion Chart – Printable pdf
Knitting Needle Sizes Conversion Chart - HiyaHiya Europe
Crochet Hook Sizes & A Handy Conversion Chart
Knitting Needle Sizes Explained + Printable Conversion Chart
Article Australian Crochet Hook and Knitting Needle Printable
Knitting Needle and Crochet Hook Conversion Chart