This package contains 250 sheets of 8-1/2x11 card stock. The paper is micro-perforated for clean seperation into 4 cards per sheet to yield 1000 finished post cards. Finished card size is 4-1/4x5-1/2. Base stock is 80lb Xerox Bold. Digitally optimized for color copiers, 100 briteness, blue-white shade, ultra smooth surface. For Lasers and Copiers.