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 size of the screen in order to ensure that the screen protector fits perfectly and provides complete coverage. Our website offers a variety of screen protectors for this device, including tempered glass, anti-glare, and privacy screen protectors. By choosing the right screen protector, customers can protect their device from scratches, cracks, and other types of damage, while also maintaining the clarity and functionality of the screen.