Basic DC Circle Pattern - The double crochet hat pattern has been around for eons. It is also a standard mandala pattern as well. Once you hit the circumference in increases then just do rounds of dc in each stitch for a deep as you want the hat.
Did you know that you can buy "self-adhesive designer shades" at Jo-Ann's Fabric & Craft store. and put ANY fabric onto the lamp shades? And trim, and etc. They are SO simple! home-decor-diy-inspiration