Revelation 21:16

The city is laid out as a square; its length is as great as its breadth.  And he measured the city with the reed:  twelve thousand furlongs.  Its length, breadth, and height are equal.

Ezekiel 43:16  The altar hearth is twelve cubits long twelve wide, square at the four corners..

Ezekiel 40:3  He took me there, and behold, there was a man whose appearance was like the appearance of bronze.  He had a line of flax and a measuring rod in his hand, and he stood in the gateway.