It is to be square, a cubit long, a cubit wide, and two cubits high. Its horns must be of one piece.
Jewish Publication Society of America Version (JPS1917) - Exodus 30:2 >A cubit shall be the length thereof, and a cubit the breadth thereof; foursquare shall it be; and two cubits shall be the height thereof; the horns thereof shall be of one piece with it.