How high is the strike zone?

Answer 1

The strike zone goes from the knee to the shoulder.

MLB Rules of Interest 2.00 states: " The Strike Zone is defined as that area over homeplate the upper limit of which is a horizontal line at the midpoint between the top of the shoulders and the top of the uniform pants, and the lower level is a line at the hollow beneath the kneecap. The Strike Zone shall be determined from the batter's stance as the batter is prepared to swing at a pitched ball. "