Parallel
Ezekiel 43:16
King James Version (1769 Blayney revision, with Apocrypha) · Berean Standard Bible
And the altar shall be twelve cubits long, twelve broad, square in the four squares thereof.
The altar hearth shall be square at its four corners, twelve cubits long and twelve cubits wide (note: 12 (long) cubits is approximately 21 feet or 6.4 meters.).