Ring hanging from a nail

A thin uniform ring of mass $m$ and radius $R=0.25\mathrm{m}$ hangs from a horizontal nail that passes through a point on its rim and is perpendicular to the plane of the ring. Given that the moment of inertia of the ring about the perpendicular axis through its center is $m{R}^2$, determine the period of small oscillations in the plane of the ring.