Sizes 6 3/8, 6 7/8 - 7 5/8, 7 7/8 - 8 1/4 and 8 3/4! This is a monster of a set in great condition. Fedora style flange. Some are manufactured by Hatters Supply House of Chicago and some by Lundstrom. Size 8 3/4 does not fit on a standard flange stand.