This black wool felt hat has a flat 2 1/2-inch brim and rounded crown. The small/medium will fit 21 to 22 1/2-inch head size, (there is a sizing cord inside the band to adjust to your head size), the large will fit up to 23 1/4 inch head size and the XLG will fit up to 24 1/8 inch head size. This hat is made in a classic vintage Annie Hall style hat and is suitable for any fall and winter weather.