1. Dimensions: The bamboo lids have a top diameter of 2.75 inch70 mm and a bottom diameter of 2.36 inch60 mm, suitable for glass cups with a bottle mouth inner diameter of 2.36inch60mm. The diameter of the straw mouth is 0.39 inches10 mm, which can be used for most sizes of straws. 2. Bamboo Material: The lid is made of natural material, which is Lead and BPA , keeping you away from harmful chemicals. The cover is very suitable for glass cups of tea, latte, coffee, cola and soda water. 3. Leak Proof: These canning lids are equipped with 2 silicone sealing rings, and the mouth sealing ring is double-layer, which provides extraordinary sealing. From now on, there is no need to worry about the liquids flowing out when the cup accidentally falls. The straw hole sealing ring can effectively protect your glass straws. 4. Suitable for Most Drinking Jars: The bamboo lids has a wide range of applications, for the common 16 oz, 20 oz and 24 oz glass cups on the market. Please measure the inner diameter of your bottle neck before purchasing. If it is a standard 2.36 inch60 mm, you can purchase without hesitation.