3.8*6.5cm Fits All Standard Bottle Necks: Champagne cork suitable for opened wine in all kind of standard bottle sizes, such as prosecco, cava, red and white wine, champagne and sparking wine. Keeps Wine Fresh Longer: The wine stopper clamps are tight to the bottle of opened wine to better maintain flavor and bubbles. keep wine tasting fresh up to 10 days. 100% Seal Anti: Our champagne stoppers use the principle of silicone elasticity, which can effectively block the convection between the air inside the bottle and the air outside the bottle. Easy to Use: Just insert the cork stopper into the bottleneck, then lock with the stainless steel safety clip. Safe Material: Wine stoppers are made of FOOD GRADE STAINLESS STEEL-SUS304 and silicone, with smooth edges that won't hurt your fingers.