About the Design:

The United States one-cent coin, often called 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.

Reverse: Abraham Lincoln sitting on a log, reading a book

Lettering: 
UNITED STATES OF AMERICA
ONE CENT
CLV
E PLURIBUS UNUM

Diameter    19 mm
Thickness    1.5 mm