Hi Jurgy!
The sizes of moons aren’t adjusted relative to their parent planets:

Is this possible to fix?

Hi!

I can take a look.
Just so I can reproduce your exact scenario, what graphics and planet/moon mods do you use?

For this scenario, I used my mod Better Planets that makes some of the planets as moons, and these are Vulcanus moons Zzhora and Froodara from related rjdunlap mods.

Thanks! Fix is out now. Let me know if you encounter any other problems or if you have any wishes.

Works perfect, thank you!!