STOPPER IS IN GREAT SHAPE WITH NO CHIPS, SCRATCHES, OR CRACKS. IT IS CRYSTAL CLEAR AND MEASURES 2-3/4" SQ. x 3-1/8" HIGH. THERE IS A 1-1/8" DIA. COLLAR AROUND A 1" DIA. STEM. THE STEM HAS MINIMAL TAPER AS SHOWN BELOW. THE COLLAR IS 5/16" HIGH. THE STOPPER IS ALL ONE PIECE OF GLASS.