Quote Originally Posted by Bdadawg
If the males and females are the same age the males will be bigger.


Weight is really the only way to determine age. Under 19 grams and they are under 6 weeks (usually) over 35 grams and they are over 6 months. Once they get over 1.5 years you will notice they are starting to go blind.

Bryan
By the way was that a guess or from experince? You were perty damn close to the chart i found but of course they are not guide lines so it will vary.