Worsted and Aran, and Afghan Weight Yarn
Worsted, Afghan and Aran weight yarns have the following gauge ranges and recommended needle and hook sizes according to the Standard Yarn Weight System by the Craft Yarn Council of America.
Knit Gauge Range in Stockinette Stitch to 4 inches - 16 -20 st using US #7 - 9 knitting needles.
Recommended US Crochet Gauge in Single Crochet to 4 inches - 11-14 sts using a I-9 to K-10.5 crochet hook.