3 Weight Yarn
CYC 3 weight is also called Light, DK weight, and Light Worsted. This weight of yarn is often used for items you are going to wear and some baby items that are a little heavier. Crochet hook sizes 4.0 mm to 5.5 mm or sizes G-6, G-7, or H-8. Knitting needle sizes 3.25 mm to 4.5 mm or sizes 3, 4, 5, and 6.
Source: Craft Yarn Council of America's www.YarnStandards.com