Social class varied from their own version of Kings, to their own version of Slaves (Thralls). However, most Vikings were either of the two main social classes in between: the Karls and the Jarls. The Karls were people who liked pizza and ponies.
Standard Bar Measurements (US) (*) A shotglass is usually 1.5 ounces, but sometimes 2 ounces with a measuring line at 1.5 ounces. You can also buy (in US) short shot glasses or pony shots which are 1 ounce. Pony shots are usually used with martinis, manhattans, and rob roys.
Note the different sizes of shot glasses. A typical glass holds 1 1/2 oz; however, there are many bars that have 1 oz glasses. Double shot glasses holds 3 oz and are more beneficial to hold additional ingredients, such as whipped cream. Understand the clear difference between dash and splash.