3m privacy filters keep confidential information private only persons directly in front of the monitor can see the image on screen others on either side of them see a darkened screen designed to fit widescreen desktop lcd monitors with a diagonally measured 18 12 viewing screen and a 169 aspect ratio actual filter dimensions are 16 116 wide x 9 116 high 409 mm x 231 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflections