This sign holder is designed to be attached to glass and the sign is visible from both sides. It can also be used on mirror or even tile if completely smooth. The sign holder portion of this display is 8.5″ wide X 11″ high. The overall size of the display is approximately 12.75 ” wide by 11.25″ high. NOTE: 4 suction cups are included with this sign holder but are not installed to reduce shipping costs.