I came across this equivalency guide to cross reference sizes between US and English Knitting Needles and Crochet Hooks. I'm sure this is available out there in 1000 different locations. But now, here it is ... 1001.
If you want to print this to put in your favorite knit/crochet book, click to enlarge, then copy/paste to a word program on your hard drive.
Thanks for dropping by,