The Canadian Shield is the largest landform region in Canada; it covers most of Canada and much of the United States. This region contains some of the oldest rocks in the world (3.96 billion years old).he Canadian Shield is the largest landform region in Canada; it covers most of Canada and much of the United States. This region contains some of the oldest rocks in the world (3.96 billion years old).
In the U.S., the half keg is considered as the most accepted size. The diameter of this keg ranges from 16.6 inches to 17.16 inches. In terms of height, the standard is 23.3 inches. It can hold as much as 15.5 gallons of liquid. When empty, it measures 29.7 pounds or 13.5 kilograms.
Commercial Kegs: Commercial style kegs all have the same fitting up top (discussed above), but there are different sizes of commercial kegs. There are 4 main sizes of commercial kegs that are used regularly. Sixth Barrel, Short/Quarter Barrel (AKA Pony Keg), Slim/Quarter Barrel, and the Half Barrel. Commercial Keg sizes are as follows: Sixth Barrel (23.3â³x9.25â³D) | 55 -12oz.