#USPS POSTCARD SIZE CODE#
The Address and Bar Code areas of the postcard should be located as follows: 4.125" x 3.125" as measured from the bottom right bleed corner.
#USPS POSTCARD SIZE FREE#
These particular areas must remain free of any text, graphics, images, logos or copy and must also remain totally white. USPS specifies that non-printable areas of the card are as follows: backside, print area, address area and mail orders only. The 'bleed' area of the postcard should extend 0.125" beyond the trim edge of the card. In the event that you desire your background to print all the way to the edge of your postcard design, you should be sure to extend them slightly beyond the trim line. It happens that trim lines vary somewhat between printers therefore you should ensure that all images, graphics, logos, or text that you want to keep falls inside the design area.