  Given a Riemannian manifold, Weyl's law indicates how the spectrum of the
Laplacian behaves asymptotically. Because of that result, there has been a
growing interest in finding geometrical bounds compatible with this law. In the
case of hypersurfaces, the isoperimetric ratio is a natural geometrical
quantity, that allows to bound the spectrum from above. We investigate the
problem and find an example of hypersurface where the eigenvalues are minorated
by the isoperimetric ratio.
