This laptop desk is portable and foldable. You can adjust the way you use it and it can be set to different heights. The metal laptop platform that holds your laptop or other items has vents for airflow. The dimension of the platform is 16.5" wide and 10.25" deep. It can accommodate most modern laptops. It also can be used as a tray for any other item or device. The full product with adjustable legs has a dimension of 20.75" wide and 10.5" deep when in the flat position. Very versatile and easy to use!