Most dorm size mini refrigerators, also known as compact refrigerators, vary in size from 1.7 cubic feet up to 4.5 cubic feet.
The smallest cube-shaped mini fridge measures 17 inches wide, 18 7/8 inches deep and 20 1/2 inches tall.
A 4.5 cubic ft mini fridge is 19.1 inches wide, 20.7 inches deep and 20 1/2 inches tall.
By default, a fridge will be classified as a large item. If your fridge is larger then the dimensions mentioned above, it is classified as an extra large item.