Who Is The Richest Big Bang Theory Cast MemberJohn Galecki height is around 165 centimeters. He is at a fair height. While some might think of him not as remarkably vertically gifted, his prowess is boundless. Regardless his upright dimension, he is respected within the entertainment world for both his acting abilities. Johnny has showcased time and again that one's stature doesn't dictate success when it comes to attaining success.