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 25 viewing screen and a 169 aspect ratio actual filter dimensions are 21 1316 wide x 12 14 high 554 mm x 312 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflections lig