Antique Set of Twelve Mason’s Ironstone China Dinner Plates Consign Now DeptCeramics & Glass, Decorative ArtsSizeDiameter 9.5 in. Antique Set of Twelve Mason’s Ironstone China Dinner Plates, polychrome floral decorations, marked on reverse “Mason’s Patent Ironstone China, England” Diameter 9.5 in. Please note that this auction has ended. Click here for an overview of this auction.