Ezekiel 40:5

5And I saw a wall surrounding the temple area. Now the length of the measuring rod in the man’s hand was six long cubits40:5 6 long cubits, the length of the reed used for measuring, is approximately 10.5 feet or 3.2 meters; similarly in verses 6, 7, and 12. The long cubit of about 21 inches or 53.3 centimeters is the basic unit of length throughout Ezekiel 40 to 48. (each measuring a cubit and a handbreadth), and he measured the wall to be one rod thick and one rod high.