The 30.7 cm (12.1 inch) [247 x 186 mm] is the size of the screen for a specific device that our website sells screen protectors for. Knowing the exact dimensions of the screen is crucial in ensuring that the screen protector fits perfectly and provides maximum protection. Our website offers a range of screen protectors specifically designed for this device, including tempered glass, anti-glare, and privacy screen protectors. By providing accurate information about the size of the screen, our customers can easily find the right screen protector for their device and ensure that their screen is protected from scratches, cracks, and other damage.