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 29 34 viewing screen and a 1610 aspect ratio actual filter dimensions are 25 316 wide x 15 34 high 641 mm x 401 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflections