The 7.6 cm (3 inch) [67.4 x 38.4 mm] measurement refers to the size of the screen protector that is compatible with a specific device. Our website offers a range of screen protectors that are designed to fit this particular size, ensuring that customers can find the perfect fit for their device. By providing accurate measurements and a variety of options, we aim to make it easy for customers to protect their screens and extend the lifespan of their devices.