How small of a cuttling off my mother plant for cloning can I get away with?

a single leaf down low or the whole branch?

This is a pic of the smallest clone I ever cut, that rooted!

The pix above show real small clones, I think. The important thing is that you want at least 2 sets of leaves on the clone,
the top and one or more sets of leaves directly below the top.
Good luck, BigSteve.

Ive rooted even smaller than those, and alot thinner stems, but you reale want good strong clones unless you have no choice and want to save a strain then good luck man!