Ezekiel 40:5

And I saw a wall surrounding the temple area. Now the length of the measuring rod in the man’s hand was six long cubits (each measuring a cubit and a handbreadth), and he measured the wall to be one rod thick and one rod high.

Note 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.

And behold a wall on the outside of the house round about, and in the man’s hand a measuring reed of six cubits long by the cubit and an hand breadth: so he measured the breadth of the building, one reed; and the height, one reed.

Behold, there was a wall on the outside of the house all around, and in the man’s hand a measuring reed six cubits long, of a cubit and a hand width each. So he measured the thickness of the building, one reed; and the height, one reed.

Note A normal cubit is the length from the tip of the middle finger to the elbow on a man’s arm, or about 18 inches or 46 centimeters. A handbreadth is about 4.3 inches or 11 centimeters, so the long cubit described here would be about 22.3 inches or 57 centimeters long. Thus, a 6 long cubit measuring reed would have been about 3 yards 26.6 inches or about 3.42 meters long.

And, behold, a wall on the outside of the house round about, and in the man’s hand a measuring reed six cubits long, of a cubit and a handbreadth each: so he measured the thickness of the building, one reed; and the height, one reed.