all kinds of knit hats
You don't.
A good place to go to buy a knit hat is etsy.com. You can find many different types including: baby hats, children hats, hats for women, hat for men.
The mall
Yes, Old Navy does carry hats for both babies and young kids. They have fleecehats, knit hats, beanies, trapper hats, cadet hats as well as baseball style caps for boys and girls, babies and young children.
P and A
Anna Zilboorg has written: 'Socks for Sandals & Clogs' '45 fine & fanciful hats to knit' -- subject(s): Patterns, Hats, Knitting 'Knitting for anarchists'
You'd probably need to know at least one kind of increase and decrease, but they could both be variations on the knit stitch (aka you don't need to know how to purl). It's also best to work hats in the round.
King Delux F.C. was created in 2012.
Katty Delux is 5' 5 1/2".
There may be a trademark on a particular brand, but not hats in general. Copyright famously does not protect fashion.
Stetson is a brand name of a line of western hats, some people call them cowboy hats.