GOD'S WORD® Translation
There was a barrier about 21 inches in front of each guardroom. The guardrooms were 10 1/2 feet square.

American Standard Version
and a border before the lodges, one cubit on this side , and a border, one cubit on that side; and the lodges, six cubits on this side, and six cubits on that side.

Berean Study Bible
In front of each gate chamber was a wall one cubit high, and the gate chambers were six cubits square.

Douay-Rheims Bible
And the border before the little chambers one cubit: and one cubit was the border on both sides: and the little chambers were six cubits on this side and that side.

English Revised Version
and a border before the lodges one cubit on this side, and a border, one cubit on that side; and the lodges six cubits on this side, and six cubit on that side.

King James Bible
The space also before the little chambers was one cubit on this side, and the space was one cubit on that side: and the little chambers were six cubits on this side, and six cubits on that side.

World English Bible
and a border before the lodges, one cubit [on this side], and a border, one cubit on that side; and the lodges, six cubits on this side, and six cubits on that side.

Young's Literal Translation
and a border before the little chambers, one cubit, and one cubit is the border on this side, and the little chamber is six cubits on this side, and six cubits on that side.

Ezekiel 40:12 Additional Translations ...