How big do Norfolk Terriers get?

Norfolk Terriers are compact, small-breed dogs with both males and females weighing 11 to 12 pounds at maturity and standing about 9 to 10 inches tall at the shoulders. 

Several factors influence their final size, including genetics, diet, and overall health. Genetics play a significant role in determining their mature size, but proper nutrition and consistent exercise during their growth stages are also essential for reaching a healthy size in adulthood.