A:Answer What matters is the size of the hole cut out not the oven. Our cutout needed a slight enlargement. This is what it was when ready to insert the ovens. 24 inches wide, 52 inches tall, You also need at least a minimum depth to the back wall of the house. We had 25 inches and that was fine. Sounds as if you likely have the width and depth if there is another oven in there now, but may need a trim at the top or bottom of the hole.