3mtrade 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 24 viewing screen and a 169 aspect ratio actual filter dimensions are 20 1516 wide x 11 1316 high 532 mm x 299 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflect