Ezekiel 40:47-48

47Then the man measured the inner courtyard, and it was a square, 175 feet wide and 175 feet across. The altar stood in the courtyard in front of the Temple.

48Then he brought me to the entry room of the Temple. He measured the walls on either side of the opening to the entry room, and they were 8-3/4 feet thick. The entrance itself was 24-1/2 feet wide, and the walls on each side of the entrance were an additional 5-1/4 feet long.