Probably 20 centimeters; otherwise, they would be raining "cigar rockets" down on Israel.
Now that was hilarious. You had me laughing so hard I literally had to be picked up off the floor. My gut actually hurts. The mental picture you painted was perfect. 20mm cigar rockets i.e. firecrackers falling out of the sky If the current situation werent so serious, Id still be laughing. Thanks for the humor!!!
Actually they're down to a bow and arrow.
They _are_ 20mm in diameter -- but they're 20 m long. And 3-staged.