Discover The Big Bang Theory Heights CelebHeightscomJon Gal vertical measurement is around 165 centimeters. He stands at a fair height. Although some may consider him not to be excessively vertically gifted, his prowess is boundless. Irrespective of Johnny's upright measurement, he is admired in the industry for his acting talent. Johnny has proved time and again that being tall doesn't define one's accomplishments when it comes to achieving excellence.