Bases for miniatures of War of the Ring board game, so different armies can be recognized by their main color (light green = elves, dark blue = gondor etc.)
Nazguls have oval base (d2=d1+0,5mm) so difference isn't that big, but watch that out when fitting miniatures. Same goes for Gollum.
Some minis can be poorly cutted and have excesive material, for that you can try print bases in scale, i.e. 101% and that should be enough. For loose fitting try 99% scale. Preferably don't change Z heigt, only XY scale ;)
The author remixed this model.
Bases are cylindrical instead of conical for better space management