round STYLE_2_FRONTround STYLE_2_BACKround STYLE_3_FRONTround STYLE_3_BACKsquare STYLE_4_FRONTsquare STYLE_4_BACKsquare STYLE_5_FRONTsquare STYLE_5_BACKsquare STYLE_1_BACKsquare STYLE_1_FRONTsquare STYLE_7_FRONTsquare STYLE_7_BACKrectangular postcard blank on reverse-STYLE 01rectangular postcard blank on reverse-STYLE 02rectangular postcard blank on reverse-STYLE 03square STYLE_3a_FRONT blank on reverse