These soft plastic self-adhesive bump dots can be placed in a variety of places for tactual identification of everyday items. Clear bump dots allow surfaces to show through? good for use on keyboards and keypads and helpful to households with sighted and low vision or blind individuals. Use on computer keyboards, musical keyboards, telephone keypads, television keypads, remote control keypads, and more. Peel and stick adhesive bump dots onto any clean, non-porous, flat surface. Twenty bump dots come in every package. Size: .500 wide x .140 tall. Look for other sizes and shapes to differentiate between bump dots used in the same area.