Standards and Guidelines for Knitting and Crochet

From the site:  "The publishers, fiber, needle and hook manufacturers and yarn members of the Craft Yarn Council of America have worked together to set up a series of guidelines to bring uniformity to yarn, needle and hook labeling and to patterns, whether they appear in books, magazines, leaflets or on yarn labels. Our goal is to make it easier for consumers to select the right materials for a project and complete it successfully."