Rough opening – 21 5/8″ x 33 7/8″. This cooktop is an estate find. Was replaced in remodel as confirmed by the family. There is some staining on a couple of the burners, and would probably be great for a cabin or deer camp type set-up. There is some build up along the bottom edge from past installation, but I believe it will not hinder a new install. There is some flaking paint under the top of the control panel. Please see pictures for evidence of condition.