The lid is not smaller or larger than the seat; the edges of both share the same contour and give it a "finished" appearance. Installation is easy and the mounting is solid; no sliding from side to side. The slow close feature means no more slamming noises. Love the EverClean finish; it really seems to minimize cleaning. When it is time for cleaning, the seat lifts right off for thorough cleaning of the toilet and seat surfaces. You might be able to spend more, but I don't think you can buy a better toilet seat.