Wilton Dome - DM9901-66https://www.crownmoldings.net/media/ecom/prodsm/wiltonround-sm.jpgClassic Ceilings Collection Wilton Dome (DM9901-66) -- Dome Dimensions: Dome Outside Diameter: 65-1/8 in., Dome Rough Opening: 60-3/4 in., Dome Opening Depth: 12-3/4 in., Dome Medallion Size: 14 in.Classic-Ceilings-Collection-Wilton-Dome-DM9901-660.00Classic Ceilingsin stockhttps://www.crownmoldings.net/Item/Classic-Ceilings-Collection-Wilton-Dome-DM9901-66