Oh check it out Thompson-Harner - customized crochet hook handles out of clay! Do your hand hurts when you crochet? Make your hands more comfortable with this easy photo tutorial for making polymer clay crochet hook handles - Dabbles & Babbles
This crochet size and weight infographic details all the different yarn weights and the specifics of each. It breaks down the yarn type, weight, wraps per inch and ply. This infographic also includes a chart of different crochet hook sizes.