Yes.
See ArM5 Errata: Targets and Sizes (p. 113):
Each Target level includes all of the possible sizes of that target, even though the spell level changes. The size of the target can be manipulated in the same way as the Target parameter, whether through Virtues, MuVi, or other techniques, but these are all changes within the same type of Target. For example, a Target Individual spell with +2 magnitudes for size, to affect an Individual 100 times the normal size, has the same Target parameter as a Target Individual spell with no magnitudes added for size.
A lengthy, conclusive discussion of this is here.