How Large Do German Shepherd Dogs Get? Can you please detail the size of males and female German Shepherds on how large they get compared to their age? For example, a chart how much a male German Shepherd dog weighs at three months, six months, nine months, twelve months, 18 months, 24 months, 30 months, 36 months. The same with female German Shepherd dogs. How much does a female German Shepherd dog weigh at three months, six months, nine months, twelve months, 18 months, 24 months, 30 months, 36 months. When is a German Shepherd dog fully grown and when do they reach full maturity level? Thank you in advance.