For me to give an honest answer I would prefer to see a pic to see how she is built. With that said... There is no rule at all that says what weight/size the female or male for that matter has to be to breed. I remember awhile back when it was said that the females had to be 1100 grams to breed and then a few years later it was 1200 and now people say 1500.... For me it all depends on the individual animal and how they look for me to know if I am going to breed them.
edit:
I just saw the pic... I would breed her without a doubt.