  Contrary to field theoretical calculations in the thermodynamic limit where
the volume is assumed to be infinitely large, the heavy-ion collisions always
carry the effects of finite size. A sufficiently small system size is expected
to affect the thermodynamic quantities and the phase diagram of the strongly
interacting matter. To study these effects one can take into account the finite
spatial extent of the system within the framework of an effective model too,
via the restriction of the momentum integrals using discretization or in a
simplified case using a low momentum cutoff. We investigated the effects of the
finite volume in a vector meson extended Polyakov quark-meson model and found a
remarkable change in the thermodynamics and the phase transition, especially in
the location of the critical endpoint.
