Green Eco-Friendly Materials, Safe and Healthy, Well Made Solid Ceramic, White Glossy, Perfect for Any Hot and Cold Beverage Keep Drinks Hot, Prevent Constant Trips to The Microwave for Warming. Protect from Dust, Bug, Dog Hair etc. Getting into Drinks ***Please measure your mug outside diameter before purchasing. Your mugs outside diameter should be about 3.25 inch/8.2 cm. This Ceramic mug lids fit 11 oz coffee mugs. It is not for bigger mugs or mini mugs. Microwave, Oven and Dishwasher Safe 2 Pieces Included. Weight 2.8 oz each lid. Lid Thickness 5.3 mm. Mug is not included. ????Please confirm purchase from the merchant “Print Supremacy” as our production of drinkware are safe, non-toxic. We do not give sales rights to any third party sellers. Third-party sellers are selling under our products’ listings may be counterfeit goods and are not guaranteed quality assurance.