Jeremiah 52:21

New King James Version

Now concerning the pillars: the height of one pillar was eighteen cubits, a measuring line of twelve cubits could measure its circumference, and its thickness was four fingers; it was hollow.

Cross References

2 Kings 25:17

The height of one pillar was eighteen cubits, and the capital on it was of bronze. The height of the capital was three cubits, and the network and pomegranates all around the capital were all of bronze. The second pillar was the same, with a network.