Ezekiel 41:8, 9, 11

I saw that the temple had a raised base all around it, forming the foundation of the side rooms. It was the length of the rod, six long cubits.

The outer wall of the side rooms was five cubits thick. The open area between the side rooms of the temple

There were entrances to the side rooms from the open area, one on the north and another on the south; and the base adjoining the open area was five cubits wide all around.