Its alcoves, its projecting walls and its portico had the same measurements as the others. The gateway and its portico had openings all around. It was fifty cubits long and twenty-five cubits wide.
NIV
And its guardrooms or chambers and its posts or pillars and its archway or vestibule measured as did the others. And there were windows in it and in its [arched] vestibule round about; the gateway was fifty cubits long and twenty-five cubits wide.
AMP
And the little chambers thereof, and the posts thereof, and the arches thereof, were according to these measures: and there were windows therein and in the arches thereof round about: it was fifty cubits long, and five and twenty cubits broad.
KJV