Ceiling height is important, as well as the overall style of the home. Mid century ranches generally don't benefit from crown molding for example...

Sorry, I did forget that detail. Ceiling height is 9 feet. Style of house is traditional. The room has one large window which has Hunter Douglas plantation style shutters and frame. Baseboard is approximately 4 inches and ornate.

Is there crown in any other parts of the house? You might want to match it if there is.

This link might help you figure out the proper style and size

6" to 6 1/2" (measured flat) is about the right size for a 9' ceiling.

Thank each of your for your comments. Very much appreciated. The link to the blog on selecting crown molding was exceptionally informative.