Maß or Mass is the German word describing the amount of beer in a regulation mug; in modern times exactly. The same word is also often used as an abbreviation for Maßkrug, the handled drinking vessel containing it, ubiquitous in Bavarian beer gardens and beer halls, and a staple of Oktoberfest. That vessel it is often referred to as a beer mug by English speakers, and can be correctly called a beer stein if made of stoneware and capable of holding a regulation Maß of beer.
Linguistics
The word "Maß" can be of either neuter or female grammatical gender. In its neuter form, das Maß, it is the German word for "measure". Its feminine version, "die Maß", is used in southern Germany and Austria to refer to a one liter glass beer mug or its contents. It is spelt "Maß" or "Mass" in Germany and Austria, "Mass" in Switzerland. The plural is also Maß. A stoneware mug is a form of beer stein, another type of vessel which may only be referred to as a Maß if capable of holding a regulation quantity of beer.
Measurement
In the Southern German areas, the Maß originally measured. Other German speaking areas had different measures: in Switzerland between 1838 and 1877, and in Baden until 1871, the Maß was 1.5 liters. The modern Maßkrug is slightly larger than 1 liter, with a fill line denoting the level to which the beer must be filled; the area above the line denotes space for the head to expand. Selling beer in mugs with a fraudulent or missing calibration mark is also prosecuted as fraud. An "Association Against Fraudulent Pouring " in Munich fights for the customer rights of beer drinkers, and is mostly active on Oktoberfest. In the more northerly parts of Germany, the Maß has mostly fallen out of use, except for Bavarian-themed events, since beer for immediate consumption there is usually sold in smaller amounts, between,
Other
Mugs are frequently decorated with a print of the sign of the brewery. Some beer gardens and restaurants rent space out to patrons to store their mugs, which often have personalized engravings on their lids. For a small monthly fee the establishment will also wash one's mug. According to physicist Erich Schuller of the Institute for Forensic Medicine at the Ludwig Maximilian University of Munich, a Maßkrug is an "effective percussion tool" in which each strike is potentially life-threatening. An empty Maß weighs and can produce a force of in a violent blow, far surpassing the required to break a human's skullcap. However, there were cases in which the Maßkrug yielded. Presumably, these mugs had reduced strength due to wear.
