To
include a variety of super thick yarns introduced to the marketplace, the Craft Yarn Council has added a new yarn weight category - Jumbo Yarn Weight #7.
The goal with this change is to make it easier for
crocheters and knitters to understand the type of fabric these Jumbo yarns
create and the range of hooks and needles generally required.
Also take note that there are slight gauge changes for Super
Bulky Yarn Weight #6.
Click on the link to download a copy of this chart for your
reference. http://www.craftyarncouncil.com/weight.html