Create professional-looking labels quickly with these bright white shipping labels. TrueBlock Technology is guaranteed to completely cover everything underneath so you can reuse mailing tubes, boxes and more. Each letter-size sheet of labels includes ten 2″ x 4″ labels that you can easily customize online with free templates and designs. Sheets are compatible with laser and inkjet printers. Adhesive is permanent. Label paper is Forest Stewardship Council (FSC) certified.