Jeremiah 52:21

And concerning the pillars, the height of one pillar was eighteen cubits, and a fillet of twelve cubits did compass it, that, in round numbers, being the circumference of either of the pillars; and the thickness thereof was four fingers; it was hollow. The thirty-five cubits of 2 Chronicles 3:15 either refer to a different cubit, or they give the sum total of both pillars less the bases.