The 16.5 cm (6.5 inch) [143 x 78 mm] is the screen size of a specific device that our website sells a range of screen protectors for. This device is popular among consumers and requires a high-quality screen protector to ensure its longevity and protection against scratches, cracks, and other damages. Our website offers a variety of screen protectors specifically designed for this device, including tempered glass, anti-glare, and privacy screen protectors. With our range of screen protectors, customers can choose the best option to suit their needs and protect their device's screen from damage.