Does anybody know of an internet store that sells women's hats in those sizes? Not "one size fits all", not "SM/MD or MD/LG", but actually big? I get headaches from the pressure if sunglasses or hats are too tight.

I would prefer a pretty straw hat and even something colorful, but I have not seen anything in my size even on reputable sites, so by now I am prepared to buy the ugliest non-straw khaki hat, as long as it is not tight and has wide brims.