Revelation 21:15-17

15The one who was speaking with me had a gold measuring rod to measure the city, and its gates and its wall.

16The city is laid out as a square, its length being the same as its width; and he measured the city with his rod—twelve thousand stadia (about 1,400 miles); its length and width and height are equal.

17He measured its wall also—a hundred forty-four cubits (about 200 feet), according to man’s measurements, which are [also] angelic [measurements].