How Tall Is an iPhone 12?: The iPhone 12 is 5.78 inches (146.7 mm) tall, offering a sleek, modern design while maintaining a compact form factor. This phone is equipped with how to add friends monopoly go the Super Retina XDR display and A14 Bionic chip, making it both powerful and easy to handle. Find out all about the dimensions and features of the iPhone 12 here.