Ezekiel 43:16
And the altar hearth [was] {twelve} [cubits] [in] length and {twelve} [cubits] [in] width; [it was] {squared on its four sides}.
Exodus 27:1
"And you will make the altar of acacia wood, five cubits long and five cubits wide; the altar will be square, and its height [will be] three cubits.
Exodus 38:1-2
And he made the burnt-offering altar of acacia wood; its length [was] five cubits, and its width [was] five cubits--[it was] square--and its height [was] three cubits.
2 Chronicles 4:1
And he made an altar of bronze, twenty cubits [was] its length, and twenty cubits [was] its width, and ten cubits [was] its height.
Ezra 3:3
They set up the altar on its foundations, because {they were in terror} because of the peoples of the lands. And they offered burnt offerings on it for Yahweh, burnt offerings for the morning and the evening.