The first hat has a pattern which can be found here.
This was made for Darcy who is 5.

This hat was made for Bella who is 3.
There was no pattern, I made it up as I went along.

This is my hat model revealed.

This hat was made for Lily who is 7.
No pattern once again, I made it up as I went along

Just thought I'd sneak this one in.
It's a cow of a hat for a baby.