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 laptops with a diagonally measured 12 12 viewing screen and a 169 aspect ratio actual filter dimensions are 10 1516 wide x 6 18 high 277 mm x 156 mm includes your choice of two easy to use attachment methods reversible matte side reduces glare and reflections lightweight