Is a mini Aussie considered a small breed?

No, a mini Aussie isn’t considered a small breed.

According to the American Kennel Club, mini Aussies, also called miniature American shepherds, are medium-sized dogs that grow to be 13 to 18 inches long and weigh 20 to 40 pounds.

If a mini Aussie was bred from a mini Aussie and a standard Australian shepherd, it will be bigger than a mini Aussie and it won’t be able to be registered or considered purebred.