HMI (Human-Machine Interface) displays come in various sizes, depending on the specific application and requirements of the industrial environment. The size of an HMI display can range from small panels for localized control to large screens for overseeing complex processes. Here are some common sizes for HMI displays:

1. Small Displays: Small HMI displays typically range from 3 inches to 7 inches in size. These compact displays are often used for localized control and monitoring of individual machines or equipment, such as on a control panel or operator station.

2. Medium Displays: Medium-sized HMI displays typically range from 7 inches to 15 inches in size. These displays are suitable for monitoring small to medium-sized processes or systems, such as production lines or standalone machines.

3. Large Displays: Large HMI displays typically range from 15 inches to 24 inches or larger in size. These displays are commonly used for overseeing complex industrial processes or systems that require detailed visualization and control, such as in manufacturing plants, utilities, or infrastructure facilities.

4. Custom Displays: In some cases, custom-sized HMI displays may be used to meet specific requirements or fit unique mounting configurations. These displays can vary in size depending on the needs of the application.

The size of the HMI display chosen for a particular application depends on factors such as the amount of information to be displayed, the viewing distance, the available space for installation, and the user interface requirements. Larger displays may offer more screen real estate for displaying detailed graphics and data, while smaller displays may be more compact and suitable for constrained spaces. Ultimately, the size of the HMI display should be selected to optimize usability, visibility, and functionality for the intended application.