The 33.3 cm (13.1 inch) [290 x 163 mm] is the screen size of a specific device for which our website sells a range of screen protectors. Knowing the exact screen size is crucial when it comes to selecting the right screen protector for your device. Our website offers a variety of screen protectors that are specifically designed to fit this device's screen size, ensuring maximum protection against scratches, cracks, and other damages. By providing accurate information about the screen size, we make it easier for our customers to find the right screen protector for their device and ensure that they get the best possible protection for their investment.