The Unite States one-cent coin is a unit of currency equaling one-hundredth of a United States dollar. Its symbol is: ¢. Its obverse has featured the profile of President Abraham Lincoln since 1909, the centennial of his birth. Since 1959 (the sesquicentennial of Lincoln's birth), the reverse has featured the Lincoln Memorial. The coin is .75 inches (19.05 mm) in diameter and .061 inches (1.55 mm) in thickness.