The height was an hundred and twenty; this being a kind of turret to the building. The breadth of it here omitted is expressed to be ten cubits, 1 Kings 6:3.
Related Commentaries of 2 Chronicles 3:4
2 Chronicles 3:4
4 And the porch that was in the front of the house, the length of it was according to the breadth of the house, twenty cubits, and the height was an hundred and twenty: and he overlaid it within with pure gold.