It is to be square, a cubit long, a cubit wide, and two cubits high. Its horns must be of one piece.
KJV
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 the same.
ASV
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.