PF24.0W9 fits widescreen Monitor computers with a diagonally measured 24.03" viewable screen; actual filter dimensions are 11 3/4" high x 20 15/16" wide. This filter is designed for widescreen laptop computers with screens that appear more rectangular than square and have a 16:9 aspect ratio. Desktop monitor privacy filters keep confidential and private information private. Utilizes 3M™'s microlouver privacy technology so only persons directly in front of the monitor can see the image on screen; passersby see only a dark screen. 3M™'s 24.0W9 Privacy Filter provides more effective privacy than competitive filters and offers more consistent quality and uniform appearance, thus reducing visual distractions.