The 33.3 cm (13.1 inch) [290 x 163 mm] is the screen size of a specific device that our website sells a range of screen protectors for. This size is important to know when selecting the appropriate screen protector for the device, as it ensures a perfect fit and maximum protection. Our website offers a variety of screen protectors for this size, including tempered glass, anti-glare, and privacy options, to meet the needs and preferences of our customers. By providing accurate sizing information and a wide selection of options, we aim to make it easy for our customers to find the perfect screen protector for their device.