Often it is made from the same baseboard used throughout the home but it can also have a different appearance entirely.
Trim work around stairs.
A stair skirt or baseboard is the trim that runs along the bottom of the wall beside the steps.
Whether the stairs install between two walls or have one open side with handrails 3 4 inch.
Put on a pair of safety glasses and cut a scrap piece of stair trim molding of the same type that you plan to install.
The scrap piece should be about 1 foot long.
Cut the scrap piece at a simple 90 degree angle.