Craft Yarn Council Sizing Standards

The Craft Yarn Council has Sizing Standards to use for knitting patterns.

Knitty.com recently reminded all submitters to use these sizes in their patterns.

When I ever get a pattern posted here, I plan on using these.

So, I'm adding a link over there in my list so i don't loose it.

There's also good information on yarns, needles, and levels of difficulty for patterns.