The 33.3 cm (13.1 inch) [290 x 163 mm] is the size of the screen for a specific device that our website sells a range of screen protectors for. This information is important for customers who are looking for a screen protector that will fit their device perfectly. By providing the exact dimensions of the screen, customers can easily find the right screen protector for their device and ensure that it will provide the necessary protection. Additionally, knowing the size of the screen can help customers compare different screen protectors and choose the one that best fits their needs.