Ezekiel 40:29

29 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.

Read Ezekiel 40:29 Using Other Translations

And the little chambers thereof, and the posts thereof, and the arches thereof, according to these measures: and there were windows in it and in the arches thereof round about: it was fifty cubits long, and five and twenty cubits broad.
Its side rooms, its jambs, and its vestibule were of the same size as the others, and both it and its vestibule had windows all around. Its length was fifty cubits, and its breadth twenty-five cubits.
Its guard alcoves, dividing walls, and entry room were the same size as those in the others. It also had windows along its walls and in the entry room. And like the others, the gateway passage was 87 feet long and 43 feet wide.