Yarn Yak

Did you know the CYCA (Craft Yarn Council of America) has all sorts of useful information for knitters and crocheters? 

For example, this chart for yarn weights is very handy. 
http://www.craftyarncouncil.com/weight.html

There is a fairly new yarn weight classification listed there - #7 Jumbo.  Click on the picture below to see all the categories but do go to the web site to get all the information. This is just a small snippet.

If you're a beginner crocheter or trying to teach someone who is a beginner, you might want to check out this page on how to read a crochet pattern. It gives a lot of useful information. It's written by the wonderful Jean Leinhauser who has since passed away (2011).  http://www.craftyarncouncil.com/tip_crochet.html

If you have a pattern with skill levels listed and you want to know where your own skills fall, check out this chart. http://www.craftyarncouncil.com/skill.html

You can get all the information together in one document if you download the pdf. 
http://media.craftyarncouncil.com/files/CYC_YS_s_and_g_rev2015_6.pdf

Happy crocheting!
Sandie