This is Zazzle's cassini postcards page, where you'll find a unique assortment of cassini postcards set up for personalization or purchase. Almost all Zazzle postcards are shipped within 24 hours. Send a special message with your own photographs and images. Zazzle's horizontal postcards are 4.25" x 5.6" and are printed on glossy, ultra-heavyweight card stock. Upload your designs at no cost. Print on both sides for free! To see more products, please visit our main cassini section.