ButtSpa is designed to fit most U.S. toilets, both round and elongated including most one-piece and curved toilet fixtures. To be sure, measure the distance between the bolt holes. The space must be between 5¼ inches and 8 inches. Then measure the distance from the center of the bolt holes to the toilet tank to ensure proper clearance. There must be at least ¾ inch of clearance. If you meet those measurement requirements then you're good to go!