Box inside size is about 13in x 9in x 5.5in. Box comes with vents pre-installed. Has space for fan inside to help with removing heat from inside the box.
(YPS Small Box Height is over 3 inches taller and depth is 1 inch bigger than the CG1500).
Box will have opening at bottom so you will get to choose from pre-drilled plates that support most popular controllers and configurations such as the Falcon and Kulp controllers. Box comes with standard with 4-port drilled.