This is a case of 12 500ml (16.9oz) German style bottles. This style is commonly seen in Germany and the United States for beers such as Weihenstephaner. Some notable American beers such as Russian River's Pliny the Elder also come in this style of bottles. These are ruggedly made and have plenty of heft to them, weighing in at 13 ounces per bottle! They are sold in a case of 12 with cardboard dividers in the case.