Enhance data security and protect your laptop's screen from everyday wear and tear with this Staples TECH 13.3-inch black widescreen privacy filter. Effective "black out" privacy from side views helps maintain the privacy of sensitive information on your display, while on-screen information remains clear to the person directly in front. The durable screen protector also shields your screen from scratches and dust. MEASURING FOR YOUR PRIVACY SCREEN PROTECTORS: Measure from the upper left corner diagonally down to the lower right corner. Make sure you measure the Viewable Area Only. For a proper fit, do NOT include the monitor or laptop frame or casing in your measurement. Also, note if your screen is in Standard (Ratio 4:3 +/-) or Widescreen (Ratio 16:9 +/-) format.