Each pillar was eighteen cubits tall and twelve cubits in circumference; each was hollow, four fingers thick.
KJV
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.
ASV
And as for the pillars, the height of the one pillar was eighteen cubits; and a line of twelve cubits did compass it; and the thickness thereof was four fingers: it was hollow.