Plain Light Cove Dome - DM9905-54https://www.crownmoldings.net/media/ecom/prodsm/covedomeinstalledplain-sm.jpgClassic Ceilings Collection Plain Light Cove Dome (DM9905-54) -- Dome Dimensions: Dome Outside Diameter: 54 in., Dome Rough Opening: 49-1/2 in., Dome Opening Depth: 14 in., Dome Rim Width: 2-3/4 in., Dome Medallion Size: 10 in.Classic-Ceilings-Collection-Plain-Light-Cove-Dome-DM9905-540.00Classic Ceilingsin stockhttps://www.crownmoldings.net/Item/Classic-Ceilings-Collection-Plain-Light-Cove-Dome-DM9905-54
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 13 feet of flexible millwork trim)