Ezekiel 42:7-9

42:7 As for the outer wall by the side of the chambers, toward the outer court facing the chambers, it was 87½ feet long. 42:8 For the chambers on the outer court were 87½ feet long, while those facing the temple were 175 feet long. 42:9 Below these chambers was a passage on the east side as one enters from the outer court.