A mid-tower case is a type of computer case that offers a balance between size and expandability. Typically, it stands about 15 to 20 inches tall and can accommodate standard ATX motherboards, making it suitable for most gaming and workstation builds. These cases often provide ample space for multiple hard drives, graphics cards, and cooling solutions, allowing users to customize their systems effectively. Mid-tower cases usually feature several fan mounting options and cable management systems, promoting better airflow and organization. They come in various designs and materials, catering to different aesthetic preferences. Overall, mid-tower cases are popular among both casual users and enthusiasts for their versatility and functionality.