Eighth jars are typically 3 to 4 ounces, depending on the fluffiness of the cannabis flower. 3 Oz eighth jars typically have a height of about 63mm and a diameter of 40mm. Glass eighth jars also have a thickness of 3mm and are compatible with 50mm to 53mm lids. For this reason, they are ideal for storing substantial amounts of various cannabis products. Their thick walls are also excellent for keeping your products safe and help maintain your bud’s shapes.