Size: 21.7 inches * 9.5 inches (55 cm * 24 cm) Ergonomic Design: Extends the desk horizontally, providing full support for your arms to relax your upper body and improve working conditions. The design has been improved many times to find the best ergonomic solution. Fantastic Space Installation: You can fold it down when you don't need to use it, saving space. When used at work, you can place more items like keyboards, notebooks, mice, etc., to increase usable space. Easy Installation: According to the installation instructions, quick installation. The entire process takes only 5 minutes, which is convenient. Hole-free installation ensures the desk remains intact. Better Compatibility: This extension plate is better compatible with standard right-angled office desks than similar products on the market. Whether on the side or front of the desk, it can be connected perfectly.