Planetary mass (upper panel) and radius (lower pannel) as a function of orbital period for exoplanets with orbital period less than 6 days (source: Wright et al. 2011). Transiting exoplanets are the red circles and RV planets are the blue squares. We note that for non-transiting planets, the minimum Msini is represented here. KOI-196b is marked by a black diamond and HD 149026b is marked with a magenta hexagon.