The 43.9 cm (17.3 Inch) [383 x 215 mm] is the screen size of a specific device, such as a laptop or monitor. Our website sells a range of screen protectors that are specifically designed to fit this screen size, providing protection against scratches, smudges, and other types of damage. These screen protectors are made from high-quality materials and are easy to apply, ensuring that the device's screen remains clear and protected for longer. Whether you're looking for a basic screen protector or a more advanced one with additional features, our website has a range of options to choose from to suit your needs.