The diameter is very large and the surface is not continuous, smooth. The middle and non-smooth part is the overall size sufficiently large, however, this is liable no suction cup. The remaining external visible ring shines and reflects; that is, if one sticks to the dashboard, dangerous as it appears the driver either directly or via the wipers. Due to the size and the thin adhesive part the product sticks hardly on uneven surfaces, as it can not compensate for unevenness! The surface of the suction cup base destroyed by the way any aesthetics of the dashboard!
