The
United States one-cent coin, commonly known as a
penny, is a unit of
currency equaling one one-hundredth of a
United States dollar. The cent's symbol is
¢. Its
obverse has featured the profile of
President Abraham Lincoln since 1909, the
centennial of his birth. From 1959 to 2008, the
reverse featured the
Lincoln Memorial. Four different reverse designs in 2009 honored Lincoln's 200th birthday and a new, permanent reverse - the Union Shield - was introduced in 2010. The coin is 0.75 inches in
diameter and 0.061 inches in thickness.