7 Weight Yarn
CYC 7 weight is also called Jumbo and Roving. This yarn is the thickest weight and is a relatively new addition to the weights from 2014 when very thick yarns hit the market. These yarns work up quickly and are often seen in pictures of arm knitting. Crochet hook sizes 15 mm or larger and P/Q, Q, and S. Knitting needle sizes 12.75 mm and larger or sizes 17, 19, 35, 36 and 50.
Source: Craft Yarn Council of America's www.YarnStandards.com