Plain Light Cove Dome - DM9905-92https://www.crownmoldings.net/media/ecom/prodsm/covedomeinstalledplain-sm.jpgClassic Ceilings Collection Plain Light Cove Dome (DM9905-92) -- Dome Dimensions: Dome Outside Diameter: 91-1/4 in., Dome Rough Opening: 84-3/4 in., Dome Opening Depth: 13-3/4 in., Dome Rim Width: 3-3/8 in., Dome Medallion Size: 20 in.Classic-Ceilings-Collection-Plain-Light-Cove-Dome-DM9905-920.00Classic Ceilingsin stockhttps://www.crownmoldings.net/Item/Classic-Ceilings-Collection-Plain-Light-Cove-Dome-DM9905-92
Smooth plain cove surface can be left as is for a clean contemporary look or a decorative millwork trim can be added for a unique one of a kind appearance (would require 23 feet of flexible millwork trim)