Avery® Shipping Labels - TrueBlock - 8 1/2" Width x 11" Length - Permanent Adhesive - Rectangle - , Inkjet - White - 1 / Sheet - 25 / Pack - Jam-free, Smudge-free Create professional-looking labels quickly using Shipping Labels with TrueBlock Technology. Labels with TrueBlock completely cover everything underneath so you can reuse mailing tubes, boxes and more. Bright-white labels have permanent adhesive and are jam-free and smudge-free. They are perfect for creating professional-looking mailings, shipping, bar-coding and organizing. Labels are designed for use in printers. Avery offers many easy-to-use templates for Microsoft Word and other popular software programs. Each sheet includes six labels.