Does the crown molding have to match the baseboards?Not exactly, but it needs to have a similar visual weight. It looks funny to have large crown molding with tiny baseboards and vice versa. If you are going to upgrade to add crown molding and you have little 3-inch baseboards, you'll want to replace those also with deeper ones. This room shows an almost perfectly matched width for crown moldings and baseboards. Unfortunately, I don't know the ceiling height, but again, this looks to be no more than 9 feet tall, and might be just a little lower.How about you? Do you see yourself adding crown molding?More: Intriguing New Ideas for Moldings and Trim