'Cubits' in the Bible

As for the pillars, the height of the one pillar was eighteen cubits; and a line of twelve cubits did compass it; and its thickness was four fingers: it was hollow.

A capital of brass was on it; and the height of the one capital was five cubits, with network and pomegranates on the capital all around, all of brass: and the second pillar also had like these, and pomegranates.