What is 21 inch?

21 inch refers to the size or dimension of a display screen or monitor, typically measured diagonally from one corner to the opposite corner. It is commonly used for desktop or laptop computers, televisions, and gaming monitors. 21 inch screens offer a more immersive viewing experience and are often preferred by gamers, designers, and professionals who require larger screen real estate for their work. Additionally, the resolution and image quality of a 21 inch screen can vary depending on the manufacturer and model. Higher-end screens may offer 4K or Ultra HD resolution, while budget options may only have 1080p resolution.