This calendar is a leaping good time. Jump for joy with the colorful photographs of these amazing frogs. This eco-friendly calendar is printed on Forest Stewardship Council (FSC) certified paper using environmentally safe inks. Size Closed: 12" W x 12" H. Sized Opened: 12" W x 24" H. ISBN-13: 9781604931686. ISBN-10: 160493168X.