A vehicular interior rearview mirror assembly includes a mirror reflective element having a glass substrate with a planar front surface and a circumferential edge along the periphery of the glass substrate. A mounting element is disposed at the rear of the mirror reflective element and includes a pivot element that is configured to pivotally mount the mirror reflective element at the vehicle. A plastic molding receives the mirror reflective element therein such that a portion of the plastic molding is circumferentially disposed about the circumferential edge of the glass substrate without overlapping onto the front surface of the glass substrate. The portion of the plastic molding provides a curved rounded transition from the front surface of the glass substrate to a side surface of the plastic molding. The plastic molding includes at least a portion of a mirror housing of the interior rearview mirror assembly.