These bamboo lids fit the 16 and 20 oz glass beer cans perfectly and almost all mason jars - large or small. Lid measures approximately 70 x 54 mm in outer diameter and inner diameter, they can work with glass of 58 - 68 mm diameter mouth. Diameter of straw hole measures approximately 15 mm (0.59 inch). The lids are made by 100% natural bamboo material, which is biodegradable and safe to use, not easy to deform or break. These bamboo lids contain detachable silicone ring. These are dishwasher, refrigerator, and freezer safe. Tips: clean lids after using; do not use water above 85°; do not store any liquid in the cup or jar when not in use; not suitable for preserving or water immersion. Always up for creating something custom and special to fit your awesome ideas, so feel free to contact me to make your ideas come to life or to personalize the lid.