Astrophysical Jet Size?
There are multiple categories of Black Hole powered astrophysical jets:

Microquasars: As their name implies, they are somewhat like a highly scaled-downed version of quasars, but unlike quasars, they are powered by accretion from a donor star. They contain stellar-mass black holes.

Quasars: They are huge systems of accretion disk(s) around supermassive black holes.  They are found in the centers of galaxies, and are very powerful, enough to outshine their host galaxies.


The size of jets depends on the type: microquasars have jets only a few light years long, whereas quasars have jets millions of light years long.
The size of the jets depends on the mass of the Black hole and the magnetic field of the black hole and the magnetic field of the accretion disk.