This agreeth with 1 Kings 7:15, where what is called here a fillet is called a thread; concerning the height of the pillars, we read the same 2 Kings 25:17 2 Chronicles 3:15.
Related Commentaries of Jeremiah 52:21
Jeremiah 52:21
21 And concerning the pillars, the height of one pillar was eighteen cubits; and a filletf of twelve cubits did compass it; and the thickness thereof was four fingers: it was hollow.