Ezekiel 43:16
The altar hearth shall be square, twelve cubits long by twelve broad.
Exodus 27:1
"You shall make the altar of acacia wood, five cubits long and five cubits broad. The altar shall be square, and its height shall be three cubits.
Exodus 38:1-2
He made the altar of burnt offering of acacia wood. Five cubits was its length, and five cubits its breadth. It was square, and three cubits was its height.
2 Chronicles 4:1
He made an altar of bronze, twenty cubits long and twenty cubits wide and ten cubits high.
Ezra 3:3
They set the altar in its place, for fear was on them because of the peoples of the lands, and they offered burnt offerings on it to the LORD, burnt offerings morning and evening.