Selecting a proper size interactive smart board directly affects viewing experience and user experience. Too small, people sitting far away cannot read text clearly; too large, it wastes budget and makes the space crowded. ELON summarizes practical size selection suggestions based on thousands of global education and office projects. For small meeting rooms and small training classrooms (10–15 people): 55 inch or 65 inch smart boards are the most popular choice. This size fits compact offices, tutoring centers and small conference rooms. Our 65-inch ELON interactive board can be installed on walls or matched with mobile rolling stands, flexible to move between different rooms. Standard school classrooms and medium-sized meeting rooms (20–35 people): 75 inch interactive flat panel becomes the mainstream option. Most primary and secondary school classrooms around the world pick 75-inch ELON smart boards. The screen distance fits students in front rows and back rows without visual pressure. Large lecture halls, big training rooms and enterprise large conference rooms (40+ people): 86 inch or 98 inch smart boards are recommended. The ultra-large screen ensures every audience can watch annotations and shared documents clearly. Many university lecture halls and corporate training centers choose ELON 86” and 98” panels for large-scale presentations. Besides screen size, you also need to consider installation methods. ELON provides two common solutions: wall-mounted brackets and mobile rolling stands, the same as the display you see in our product catalog. Mobile stands allow users to shift the smart board between classrooms, which is ideal for schools with limited equipment budget. Before placing bulk orders, you can send your room size and layout to ELON professional engineers. We provide free size planning advice for project buyers, distributors and school procurement departments.