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.
Trim work around stairs.
A stair skirt or baseboard is the trim that runs along the bottom of the wall beside the steps.
Adding trim between the stairs and drywall hides any gaps and adds architectural value to a staircase.
The scrap piece should be about 1 foot long.
Baseboard trim can be cut with mitered corners and follow the angles of each tread and riser.
Whether the stairs install between two walls or have one open side with handrails 3 4 inch.