The 10.9 cm (4.3 inch) [96.5 x 55.3 mm] is the screen size of a specific device that our website sells a range of screen protectors for. It is important to know the exact screen size of your device in order to choose the correct screen protector that will fit perfectly and provide optimal protection. Our website offers a variety of screen protectors for this particular screen size, including tempered glass, anti-glare, and privacy screen protectors, to cater to different needs and preferences of our customers.