I think she will be around 10 pounds.... I remember once Dr.Jean told me (when my kittens were about 5-6 months old) - their weight will be doubled from that age. So, let's say if the kitten is about 5 pounds at the age of 5-6 months, she should be 10 pounds when she is adult.
On the other hand, if they get overweight you can always adjust their food. Am I right?
Her Spay Date is June 22. BTW I have to thank everyone here, a few days ago my computers hard drive crashed and I lost everything, had it not been for this forum I wouldn't have put the pictures on the hosting site and while I did lose some pictures, I didnt lose my favorites of her or her baby pictures so Thank You Cat Forum!