Send a postcard and save a mini-book! The Cooper Hewitt Object of the Day Postcard Book is uniquely perforated, allowing you to send the 30 unique postcards on the right side while keeping the tiny book on the left. The postcards feature artfully designed objects from the renowned collection at the Cooper Hewitt, National Design Museum, representing a wide range of eras and styles. Beautiful, informative, and functional.<br>. 30 postcards, 30 unique images<br>. Perforated<br>. Postcard book measures: 9 x 4"<br>. Individual postcards measure: 6 x 4"<br>. Standard letter postage required