Jeremiah 52:21

For every pillar was eighteen cubits high, and the rope that went about it, was twelve cubits, and four fingers thick and round.

2 Kings 25:17

The height of the one pillar was eighteen cubits, and the head thereon was brass and three cubits long with a wreath and pomegranates round about upon the head, all of brass. And of the same fashion was the second pillar with a wreath.

1 Kings 7:15-21

He cast two pillars of brass of eighteen cubits apiece high, and a string of twelve cubits might compass either of them about.

2 Chronicles 3:15-17

And he made before the house two pillars of thirty five cubits long. And the head that was above on the top of one of them was five cubits.

Treasury of Scripture Knowledge

Summary

And concerning the pillars, the height of one pillar was eighteen cubits; and a fillet of twelve cubits did compass it; and the thickness thereof was four fingers: it was hollow.

Bible References

Concerning

1 Kings 7:15
He cast two pillars of brass of eighteen cubits apiece high, and a string of twelve cubits might compass either of them about.
2 Kings 25:17
The height of the one pillar was eighteen cubits, and the head thereon was brass and three cubits long with a wreath and pomegranates round about upon the head, all of brass. And of the same fashion was the second pillar with a wreath.
2 Chronicles 3:15
And he made before the house two pillars of thirty five cubits long. And the head that was above on the top of one of them was five cubits.