  Sausage waves have been frequently reported in solar magnetic structures such
as sunspots, pores, and coronal loops. However, they have not been
unambiguously identified in photospheric bright points (BPs). Using
high-resolution TiO image sequences obtained with the Goode Solar Telescope at
the Big Bear Solar Observatory, we analyzed four isolated BPs. It was found
that their area and average intensity oscillate for several cycles in an
in-phase fashion. The oscillation periods range from 100 to 200 seconds. We
interpreted the phase relation as a signature of sausage waves, particularly
slow waves, after discussing sausage-wave theory and the opacity effect.
