Place the wooden chair on a sturdy table.
Identify the two longest legs. Once these legs are shortened slightly, the chair will be level.
Peel the backing off two coarse sanding discs, revealing the sticky sides.
Place the sanding discs, sticky side down, on the table and underneath the chair’s longest legs.
Grasp the two longest chair legs in your hands and move them firmly over the sanding discs. Continue until the chair sits level on the table.