The 31.8 cm (12.5 inch) [277 x 156 mm] is a screen size measurement for laptops and tablets. Our website sells a range of screen protectors that are specifically designed to fit this screen size. These screen protectors are made from high-quality materials that provide excellent protection against scratches, smudges, and other types of damage. They are easy to install and remove, and they do not leave any residue behind. Whether you are looking for a clear screen protector or one with anti-glare properties, we have a wide selection to choose from. Protect your device's screen and keep it looking like new with our range of screen protectors.