Features: Compatible with laser printers, inkjet printers, copiers, color laser printers, and color copiers, as well as manual writing with pens, highlighters, markers, and other writing tools. Matte white self-adhesive labels with straight corners and permanent adhesive. Opaque, to perfectly hide old labels that you no longer want to see. Default label format in most printing software. Permanent adhesive, easy application and adhesion on paper, plastic, glass, metal, and other non-porous materials. Sheet size: A4 21 x 29.7 cm. Label size A4 10.5 x 3.7 cm. Number of sheets: Package: 25 sheets, 16 labels per sheet, total 400 labels.