Yarn weight? Your questions answered
You have a pattern that calls for a DK weight, or Worsted weight, Lace weight, Sport weight or Super Fine, what is that size in relation to the Craft Yarn Council markings that are on commercially made yarns. These posted sizes (thicknesses) are using the Craft Yarn Council standard numbers 0, 1, 2, 3, 4, 5, 6, 7.
When I first started crocheting I did not know the difference between weights of yarn all I knew was I could use the one with the 4 on the label. In the 30 years I have been crocheting I have learned to read patterns, write patterns, what yarn weight means within a pattern and how to adjust a pattern because I really like this other weight of yarn better.
The uniform numerical and picture weights you see below are from the Craft Yarn Council. The Craft Yarn Council (CYC) is the representation of yarn companies, magazine, book publishers and accessory manufacturers within the yarn industry. To learn more about the CYC please visit their website at www.craftyarncouncil.com
Source: Craft Yarn Council of America's www.YarnStandards.com