The 26.4 cm (10.4 inch) [210 x 158 mm] is the screen size of a specific device, such as a tablet or e-reader. Our website sells a range of screen protectors that are specifically designed to fit this screen size and provide protection against scratches, cracks, and other types of damage. By offering a variety of screen protectors, including tempered glass and film options, we aim to provide our customers with the best possible protection for their device's screen. Whether you use your device for work or play, our screen protectors will help keep it looking like new for longer.