Expect the dog to take the traits of the parents including the weight and height. However, it is not easy to give what weight she will get. Just feed her normally and enjoy the play in your house. You can also seek help from the veterinary.
Pugs tend to be smaller to medium sized dogs. But with her being mixed there's no way to know. She could be part great Dane for all we know. Take her to a vet. There would be able to help you better. Good luck ;)