Whether the stairs install between two walls or have one open side with handrails 3 4 inch.
Trim work around stairs.
Cut the scrap piece at a simple 90 degree angle.
Baseboard trim can be cut with mitered corners and follow the angles of each tread and riser.
A stair skirt or baseboard is the trim that runs along the bottom of the wall beside the steps.
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.
Often it is made from the same baseboard used throughout the home but it can also have a different appearance entirely.