In this paper, we consider the problem of estimating the size of an inclusion in the shallow shell. Previously, the same problem was studied in [M. Di Cristo, C. L. Lin, and J. N. Wang, Ann. Sc. Norm. Super. Pisa Cl. Sci.] under the assumption of fatness condition. We remove this restriction in this work. The main tool is a global doubling estimate for the solution of the shallow shell equation.