Ezekiel 43:13-15

13And these are the measures of the altar by cubits: (the cubit is a cubit and an handbreadth:) the bottom shall be a cubit, and the breadth a cubit, and the border thereof by the edge thereof round about a span: and this shall be the base of the altar.

14And from the bottom upon the ground to the lower settle shall be two cubits, and the breadth one cubit; and from the lesser settle to the greater settle shall be four cubits, and the breadth a cubit.

15And the upper altar shall be four cubits; and from the altar hearth and upward there shall be four horns.