The 29.5 cm (11.6 inch) [256 x 144 mm] is the screen size of a specific device that our website sells a range of screen protectors for. This size is important for customers to know as it ensures they purchase the correct size screen protector for their device. The dimensions of 256 x 144 mm also provide additional information to customers who may need to know the exact measurements of their device's screen. By providing this information, our website aims to make the purchasing process as easy and accurate as possible for our customers.