The 47 cm (18.5 inch) [410 x 231 mm] is a screen size measurement for a specific device that our website sells screen protectors for. This measurement is important for customers to know so they can select the correct size screen protector for their device. Our website offers a range of screen protectors that are designed to fit this specific screen size, ensuring that customers can protect their device from scratches, cracks, and other damage. By providing accurate measurements and a variety of options, our website makes it easy for customers to find the perfect screen protector for their device.