NET
17 “You are to make an atonement lid of pure gold; its length is to be 45 inches, and its width is to be 27 inches.
Darby
17 And thou shalt make a mercy-seat of pure gold: two cubits and a half the length thereof, and a cubit and a half the breadth thereof.
KJV
17 And thou shalt make a mercy seat [of] pure gold: two cubits and a half [shall be] the length thereof, and a cubit and a half the breadth thereof.