Albert Einstein was a German-born theoretical physicist, widely acknowledged to be one of the greatest physicists of all time. Einstein is best known for developing the theory of relativity, but he also made important contributions to the development of the theory of quantum mechanics. Relativity and quantum mechanics are together the two pillars of modern physics.
Size - 17 X 17 mm / 0.67 X 0.67 inches
Weight - 9 g / 0.32 Oz
Hole - 6 mm / 0.24 inches