The shape of semiflexible polymer rings is studied over their whole range of flexibility. Investigating

the joint distribution of asphericity and the nature of asphericity as well as their respective averages, we

find two distinct shape regimes depending on the flexibility of the polymer. For a small perimeter to

persistence length the fluctuating rings exhibit only planar, elliptical configurations. At higher flexibilities

three-dimensional, crumpled structures arise. Analytic calculations confirm the qualitative behavior of the

averaged shape parameters and the elliptical shape in the stiff regime.