The 7.6 cm (3 inch) [67.4 x 38.4 mm] is a standard screen size measurement used in the electronic device industry. Our website sells a range of screen protectors that are specifically designed to fit devices with this screen size. These screen protectors are made from high-quality materials and are designed to provide maximum protection against scratches, cracks, and other types of damage. Whether you have a smartphone, tablet, or other electronic device with a 3-inch screen, our screen protectors are the perfect solution to keep your device looking like new.