Coffeeman's Note: This size filter fits many 0.5 Gallon commercial brewers. Filters are measured across their diameter, and across their bottom producing two measurements. We call this size a #12 Filter because in the 1960's, it was first introduced for what were then known in the New York trade as "12-cup brewers".
They measure 9.75" x 4.5" 2/500 Count.
