I created a list from my searches on the internet.
I don't have this but it exists if anyone wants it. it's a hat size book.
You can find head Circumference charts here..http://yarnstandards.com/headsize.html
You can also look at other hat patterns that can tell you how high a hat has to be.
Here are preemie baby measurements...http://www.carewear.org/patterns/kni...c_knit_hat.cfm