This oval-shaped universal bottle stopper fits all champagne and wine bottles. Swing-down arm locks the seal by snapping around the bottle neck below the bottle rim. A three-step inner core automatically adjusts to any bottle diameter. The silicone sealing core inserts 13/16 inch into the bottle opening. Inside this sealing core a central hole lets gas from Champagne inflate the chamber to create a better seal Colors: Black and Burgundy. Stands 2-1/2 inches high, 2-1/4 inches wide.