The 16.5 cm (6.5 inch) [143 x 78 mm] is the screen size of a specific device that our website sells screen protectors for. This size is important for customers to know because it ensures that they are purchasing the correct size screen protector for their device. By providing this information, customers can be confident that their screen protector will fit their device perfectly, providing optimal protection against scratches, cracks, and other damage. Our website offers a range of screen protectors specifically designed for this size, ensuring that customers can find the perfect fit for their device.