The top has a diameter of 28 cm (11").  The front crown is deeper at 8 cm (3 1/8"), tapering to a more narrow width at the back crown of 4 cm (1 1/2").   The band measures 3.4 cm (1 3/8") wide.
 
Made from 100% cotton velvet with a distressed texture. Fully lined.
 
Available in X-Small 20.5" (52 cm), Medium 22.5" (56 cm)