It is huge. it fills the full volume of an Ikea Kallax opening, I have mine hanging out so wires in back against the wall have some room…plus some airflow. if the Kallax wasn’t against a wall it would slide back all the way. It has plastic feed about 12-15 mm tall (I think) feet are about 3mm too tall so I trimmed them. But on thingverse somebody made a 3d printer model for replacing them.