  We extend several measurement-based definitions of effective "cat-size" to
coherent state superpositions with branches composed of either single coherent
states or tensor products of coherent states. These effective cat-size measures
depend on determining the maximal quantum distinguishability of certain states
associated with the superposition state: e.g., in one measure, the maximal
distinguishability of the branches of the superposition is considered as in
quantum binary decision theory; in another measure, the maximal
distinguishability of the initial superposition and its image after a
one-parameter evolution generated by a local Hermitian operator is of interest.
The cat-size scaling with the number of modes and mode intensity (i.e., photon
number) is compared to the scaling derived directly from the Wigner function of
the superposition and to that estimated experimentally from decoherence. We
also apply earlier comparison-based methods for determining macroscopic
superposition size that require a reference GHZ state. The case of a
hierarchical Schr\"{o}dinger cat state with branches composed of smaller
superpositions is also analyzed from a measurement-based perspective.
