In this video

Using your measuring tape, accurately measure the width and depth of each individual stair tread. The depth measurement is taken from the very edge of the bullnose (the rounded, protruding part of the stair tread) to the face of the existing riser (the vertical board at the back of the step). It is crucial to measure each tread separately, as stairs are rarely identical in size or perfectly square. Once measurements are taken, record them on a notepad. Then, transfer these precise measurements onto the Cap-A-Tread laminate material, marking the cut lines clearly with a pencil.