PRIVACY FILTER DIMENSIONS: Width: 18 3/4" ( 18.8 inches/476 mm), Height: 10 9/16" (10.6 inches/268 mm), Diagonal: 21.5" (546.1 mm), Aspect Ratio 16:9, NOTE: Please measure the width and height of the screen before purchasing (only the screen, not including the frame), it's not recommended to make your selection based solely on your computer screen's diagonal size. | ENHANCED PRIVACY AND WIDELY USED: After installing the privacy film, the screen has a visible area of 60° on the front, which makes the front of the screen clear. When viewed from the two sides of the computer (the angle is 30°-60°), it will look very dark and the screen content can not be seen. NOTE: Does not block visibility directly behind you. It is very suitable for use in aircraft, subway, airport and public places. | DOUBLE SIDES SCREEN & ANTI GLARE: It can be used double-side by that the matte surface has an anti-glare and the gloss surface has a clear picture. The matte side reduces extra glare and reflections, If you need anti-glare effect, Can be use the glossy side of the filter to attach on the screen.[Note: If your computer has a glossy screen，Suggest using the matte side of the filter to attach on the screen which can help avoid the bubble], It also protects your eyes from glare, and blue light. | TWO INSTALLATION METHODS: Installation Method 1: Double Side Tapes. Uses clear adhesive strips that securely attach to any screen. Installation Method 2: Hang Tabs(for Raised Bezel Screens Only), Uses slide mount tabs that easily stick to the display frame, allowing you to slide the filter on and off the screen as needed. Anyone can easily install and uninstall, reusable. | PACKAGE CONTENTS - Each package include one privacy filter, two set installation kits and a microfiber cleaning cloth. Service: if you have any questions about the size, please contact us. We provide you with professional solutions.