Knit flat and then seamed, great for a beginner hat, and great for a beginner cable project.

Sizes:
Baby 9-12 months, Toddler, preschooler, small child: US 9 needle knit flat,
yarn: Bernat Softee Chunky solids or other bulky yarn around 7 wpi to obtain gauge (21 rows, 14sts/4inches in st st)

Teen to to Adult up to head 21 inch circumference: US11 needle knitting flat,
yarn: Bernat Softee Chunky solids, or other bulky yarn (7wpi) to obtain gauge (18 rows and 12 sts/4inch in st st)

Adult 22-23 inch head circumference: US 13 needle knitting flat,
use a super bulky yarn with 5-6 wpi like Bernat Softee Chunky Ombres or other yarn to obtain gauge (14 rows and 9sts/4inch in st st)