Really nice t-shirt rug. Like the tutorial on adding stitches after every pass. / I have my Mom's crochet hook for this---- NOW I have an incentive to get to work on some rugs! Had some rugs she made --- wore well but now have passed!
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.