Fillers are finished on the face, and 2 long edges. They are 96" long and can be cut to size for wall and base cabinets. They also can be used as needed to finish an install, or add a decorative touch to the cabinetry design. Use them on the back of an island. Add them to some crown to create a taller top trim. You can use them by themselves for crown, to create a contempory look. Several other uses, like some light valance - the possibilities are vast.