The 30.7 cm (12.1 inch) [247 x 186 mm] is the screen size of a specific device, and our website sells a range of screen protectors that are designed to fit this size. These screen protectors are made from high-quality materials that provide excellent protection against scratches, cracks, and other types of damage that can occur to the device's screen. Our screen protectors are easy to install and are designed to be durable and long-lasting, ensuring that your device's screen remains protected for a long time. Whether you are looking for a clear screen protector or one with added features such as anti-glare or privacy protection, our website has a range of options to choose from that are specifically designed for this screen size.