  In this paper we present a measurement of the natural widths of $\Sigma_c^0$
and $\Sigma_c^{++}$. Using data from the FOCUS experiment, we find
$\Gamma(\Sigma_c^0) = 1.55 +0.41/-0.37 \pm 0.38$ MeV/c^2 and
$\Gamma(\Sigma_c^0) = 2.05 +0.41/-0.38 \pm 0.38$ MeV/c^2. The first errors are
statistical, the second systematic. These results are obtained with a sample of
913 $\Sigma_c^0 \to \Lambda_c^+ \pi^-$ decays and 1110 $\Sigma_c^++ \to
\Lambda_c^+ \pi^+$ decays. These results are compared with recent theoretical
predictions. PACS numbers: 14.20.Lq 13.30Eg
