Cross reference
Ezekiel 41:8
8 And I have looked at the house, the height all round about: the foundations of the side-chambers `are' the fulness of the reed, six cubits by the joining.
Ezekiel 40:5
5 And lo, a wall on the outside of the house all round about, and in the hand of the man a measuring-reed, six cubits by a cubit and a handbreadth, and he measureth the breadth of the building one reed, and the height one reed.
Revelation 21:16
16 and the city lieth square, and the length of it is as great as the breadth; and he did measure the city with the reed -- furlongs twelve thousand; the length, and the breadth, and the height, of it are equal;