This sign holder is 3 1/2 x 5 1/2 (H x W). The frame is 7/16 inch thick black high impact styrene plastic. This sign holder works in both the horizontal and vertical position and has a slot making it easy to insert a card. The kit includes a 1 3/4 inch (D) suction cup and mounting clip so it can be attached to glass and other smooth surfaces. This sign holder is quick and simple to assemble.