The 50.8 cm (20 inch) [443 x 250 mm] is a measurement used to describe the size of a computer monitor or laptop screen. At our website, we sell a range of screen protectors that are specifically designed to fit screens of this size. These protectors are made from high-quality materials that provide superior protection against scratches, smudges, and other types of damage. By using a screen protector, users can extend the life of their device and ensure that it remains in pristine condition for years to come. Whether you're looking for a basic screen protector or one with advanced features like anti-glare or privacy protection, we have a wide selection to choose from.