The MAS stands 13 and up to (but not including) 18 inches at the shoulder and weighs 20 to 35 pounds. They are compact, well balanced, very athletic and alert without being hyperactive or "yappy". The coat is moderate in length, straight or slightly wavy, with undercoat, and comes in blue merle, black, red merle and red, all with or without white markings and tan (copper) points. They require minimal grooming (brushing once a week or as required depending on their activities, and only occasional bathing), though some may experience a dramatic seasonal shed. They tend to have little "doggy odor". The eyes may be brown, blue, amber or green, or any color combination including flecked or marbled, or one eye different than the other. The tail will either be naturally bobbed or docked at an early age. Though there is a standard for these dogs, the variety in appearance and love-ability coaxes many people to want more than one!

This breed needs regular exercise and is versatile, hardy and enthusiastic. They are sensitive and easily trained, and should be handled gently as a result of this. MAS are good guardians of the home, confident, possessing varying degrees of herding instincts, and are entirely devoted to their masters. They need affection from their families but are not overbearing. They typically get along well with other dogs and pets as well as people, including children, though they may be reserved at first. The "Mini Aussie" is a fun-loving dog, often excelling in agility, obedience, flyball, frisbee and other sports.