Rottweiler puppies can vary in size depending on factors such as genetics, diet and overall health. A newborn puppy would typically weigh around 1 pound (0.5 kilograms).
As a breed they grow and mature slowly. At around 8 weeks old, Rottweiler puppies can weigh between 13.5 and 15 pounds (6 to 7 kilograms) or more.
Rottweilers usually reach their full adult size and weight between 18 months and 2 years of age.