1Place the stadiometer on the floor against the wall. 2. Pull the tape measure up far enough for the zero to line up exactly with the red stripe in the measurement display area. Then mark the site of the drill hole on the wall on the upper part of the attachment hole. 3. Attach the end of the tape measure to the wall using the screw supplied. 4. Push the stadiometer back together. 5. measurement Material: ABS Range: 0-2m Color: black Size: approx. 15 x 11.5cm Package: 1 x Stature Meter 2 x Screws