What is the smallest cutting you can take from a cannabis plant?

I would like to know if there is a minimum required length that a cutting has to be to root.

I have an organic rooting gel and peat pellets and wanted to root a few cuttings from my venice beach afghan feminized plants.

Also, how would I adjust the rooted cutting back to the open environment from a propagator.

About two inches. I have my best resultsgoing straight into a seed starter soil. But is using a prop, just put them into soil when ready, carefully.