Left Curve staircase highly detailed elegant Victorian look. Fully assembled. For use with 9" or 10" ceiling. Size: 3" width of riser/stringer x 9" high + 1 additional loose step if needed for a 10" ceiling. Requires approximately 5.5� width and a 8.5" length of floor space to install the stairs. The opening for the top has to be cut in a circular shape.