Mini Australian shepherds get as big as 18 inches in length and 40 pounds. Females are smaller than males, but only by an inch or two.
Mini Australian shepherds were bred to be smaller than standard Australian shepherds and, therefore, grow to half the size. Mini Australian shepherds are considered medium-sized dogs and their size is comparable to that of a border collie.
Mini Australian shepherds can live in apartments or houses, but they need a regular exercise routine and mental stimulation to prevent destructive habits.
The high energy level and medium size of mini Australian shepherds make them great companions for families with children or other pets that your dog can play with.