Use a permanent marker to write on the label, then simply erase with a white eraser. Strong and durable labels are perfect for identifying plastic storage containers, cardboard boxes and files. Not for use with printers. • Erase permanent marker with a white eraser. • Won't smear or smudge. Erase permanent marker with a white eraser. Won't smear or smudge. Shape: Rectangular; Label Size - text: 0.88 x 2.88; Label Color(s): White; Color Family: White.