Measure Your Screen Size Method: If the visible area of your display has the following dimension Width x Height (Exclude Frame and Arrow 1 to 3 mm errors): 20 15/16" x 11 13/16" (532 mm x 299 mm) , then this filter is good for you. Very Important: to double check your screen's Width and Height excluding frame before ordering. It's not recommended to make your selection based solely on your screen's diagonal size | Left and Right Privacy: Not block visibility directly behind you, regardless of distance. The privacy filter makes the screen appear dark when looking at it from an angle (left and right 30 degree- 180 degree), but clear when looking directly at it. To change the privacy levels, simply adjust your monitor's brightness level accordingly | Matte and Glossy Two Sides to Choose: It's a reversible privacy screen filter, giving you the flexibility to choose glossy or matte finish. The matte side will have less glare, however the glossy side will have stronger privacy | Perfect for Open Workspaces: Ensure your working space is bright and well lit. Privacy screens do not work in dimly lit areas | Two Installation Option: Option 1 uses clear double side adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that stick to the display frame edge, allowing you to take out the privacy screen filter easily as needed