Pan - cake, Swans Down, round angle food style, hollow cylinder rising in the middle (4 3/4" L x 1 1/2" diameter), embossed on bottom "Swans Down Cake Flour Makes Better Cakes", two (2) moveable steamer vents on sides, embossed on sides "Swans Down Cake Pan Pat. Dec. 18-23" and "E. Katzinger Co. Chicago Licensed Mers".