Hats and more hats

Some colorful hats in watercolor (scroll down to see them all.)
This is the theme of the week at Illustration Friday and a good excuse to play again with the paints! As it its hats, in plural, so be it: many hats to choose!
All these small illustrations are on a single watercolor paper sheet. I have cropped each and then, the nice Polaroid-like frame has been added to each image with the handy-dandy Polaroize web service.