  Studying structural parameters of brightest cluster galaxies (BCGs) provides
important clues to understand their formation and evolution. We present the
results of the surface brightness profile fitting of 1685 brightest cluster
galaxies (BCGs) drawn from the Canada-France-Hawaii Telescope Legacy Survey in
the redshift range of $0.1 < z < 1.0$. We fit $r$-band images of BCGs with a
single S\'ersic profile. The sample is splitted into two groups based on the
host cluster richness to investigate the impact of the environment. Our results
suggest that BCGs in rich clusters are statistically larger than their
counterparts in poor clusters. We provide best-fit linear regressions for the
Kormendy, the $log \ R_e - log \ n$, and the size-luminosity relations. In
addition, we examined the evolution of the structural parameters, however the
BCGs in our sample do not show a significant size change since z$\sim$1.
