Maine became the 23rd state to enter the union on March 15, 1820. This two-coin set of brilliant uncirculated U.S. Minted quarter dollars is an educational and convenient way to collect every quarter in the 56-coin series. The colorful tri-fold card includes interesting historical facts about the state and the significance of its quarter design. It includes notable natives, population and other interesting statistics to study and enjoy. The collection opens up to a 5" x 15" vertical tri-fold.