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 23 916 viewing screen and a 169 aspect ratio actual filter dimensions are 20 916 wide x 11 916 high 522 mm x 294 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflections