The product is a postcard book featuring 30 full-color, full-size postcards of Van Gogh's paintings. Each postcard is printed in a lithograph format, with a standard size of 5.5 x 3.5 inches. The postcards are unposted and perfect for art enthusiasts to enjoy the beauty of Van Gogh's artwork through the mail or as decorative pieces. The theme of the postcards is centered around art, making them a great gift for fans of Van Gogh and the world of painting.