Single molded clear glass shelf support, 15" tall, 7" diameter hexagonal base, 7 1/4" wide top. This kind of decorative support was used in drug stores and soda fountains with glass shelves. It was eye-catching and sanitary. This riser has a blue marble stuck at the narrow end of the recessed area on the base. We tried some soapy water, tried tapping the exterior with a wooden spoon handle and neither method dislodged the marble. No chips or cracks to the glass, recessed interior is a little cloudy, a couple of surface scratches on the outside.