  The scaling form and system-size dependence of the low-frequency wing of the
nonphononic vibrational spectrum of two-dimensional structural glasses have
been debated in recent literature. Here we provide numerical evidence that the
prefactor $A_{\rm g}$ of the low-frequency nonphononic vibrational spectrum --
the latter grows from zero frequency ($\omega\!=\!0$) as $A_{\rm
g}\omega^\beta$ -- is system-size dependent, and that the exponent $\beta$
exhibits a similar glass-formation-protocol and system-size dependence as seen
in three-dimensional structural glasses.
