VEHICULAR REARVIEW MIRROR ASSEMBLY

A vehicular exterior rearview mirror assembly includes a mirror head mounted at a mounting structure. An electro-optic reflective element is attached at an attachment element that attaches at an electrically powered actuator accommodated by the mirror head. The reflective element has a front glass substrate having a first thickness less than 2.3 mm and a rear glass substrate having a second thickness less than or equal to 1.6 mm. The first and second perimeter edges of the glass substrates combine to provide a curved transition from a first surface of the front glass substrate and an outer surface of the mirror head. The mirror head includes a protruding portion that is at least partially received at a notched region of the rear glass substrate. An outer surface of the protruding portion corresponds with the second perimeter edge of the rear glass substrate at the notched region.