Jeremiah 52:21

King James 3 - The Literal Traslation

And as to the pillars: the height of one pillar was eighteen cubits, and a line of twelve cubits went around it, and its thickness was four fingers; it was hollow.

Cross References

2 Kings 25:17

Eighteen cubits was the height of the one pillar, and the capital on it was of bronze, and the height of the capital was three cubits, and the grating and the pomegranates were on the capital all around; all of bronze. And the second pillar was like these with the grating.