This is an easy way to make a doll hat. Using items around the house you can embellish your hat anyway you like.
I used a simple piece of cardboard from a shipping box. A typical hat should be 6"-7" in diameter. The center hole can be 3.5"- 4". You can cover the cardboard in scrapbook paper, felt, or fabric.
Embellish the top of the hat in florals or fabric.
You can also make a hat using this simple tutorial.