The Black Russian Terrier (BRT) is a large and robust dog breed known for its protective instincts, intelligence, and versatility. These dogs typically weigh between 80 to 130 pounds and stand around 26 to 30 inches tall at the shoulder. Black Russian Terriers have a muscular and imposing build, with a dense double coat that is black or black with some gray hairs. They have a confident and alert expression, with dark, expressive eyes and a beard-like facial hair.