Create professional looking labels quickly. Bright white labels with TrueBlock Technology are guaranteed to completely cover everything underneath so you can reuse mailing tubes, boxes and more. Easy to customize using free Avery design tools and templates. This product was made from wood that came from a certified managed forest. Laser and Inkjet Compatible. Label Size – text: 4 x 6 Label Colors: White Machine Compatibility: Inkjet Printers Laser Printers Materials: Paper.