  We present the stellar mass profiles of 147 isolated quiescent galaxies in
very low-density environments (i.e., void regions) in the local Universe
($0.01<z<0.06$) from the Sloan Digital Sky Survey. These galaxies have stellar
masses between $ 9.8\lesssim \log(M_{\ast}/M_{\odot})\lesssim11.2$ and they
represent $\sim15\%$ of the whole galaxy population in the void regions down to
$M_{r} = -19$. We do not find any isolated quiescent galaxies with
$\log(M_{\ast}/M_{\odot})\gtrsim11.2$. We compare the stellar mass profiles of
these isolated quiescent galaxies with the profiles of stellar mass-matched
samples of the quiescent galaxies in group and cluster environments. We find
that, at fixed mass, quiescent galaxies in voids have similar central ($1$ kpc)
mass densities ($\Sigma_1$) and central velocity dispersions ($\sigma_1$)
compared to their counterparts in groups and clusters. We show that quiescent
galaxies in voids have at most $10-25\%$ smaller half-mass (and half-light)
sizes compared to quiescent galaxies in groups and clusters. We conclude that
for the intermediate stellar mass range of $10^{10}-10^{11}M_{\odot}$ in the
local Universe, environmental mechanisms have no significant additional effect
on the mass profiles of the quiescent galaxies.
