Approximately 90 to 130 pounds. Please see the link below for a BMI calculator for teens. http://kidshealth.org/teen/food_fitness/dieting/weight_height.html Obesity in children is on the rise, and most parents of overweight children think their children are at a healthy weight. There is a fine line between wanting your child to be healthy, and being one of those parents that doesn't want their child to "be fat," so do tread this water carefully. My best suggestion for you is to lead by example. If you live a healthy lifestyle, it makes it easier for your child to do so. If you have real concerns, go with your daughter to a registered dietician (check the yellow pages, or your local hospital, they often employ them). They are happy to offer advice on healthy eating, and making good food choices, combined with learning proper portion sizes. I cannot stress enough how important it is to have a healthy self-image, nor can I stress enough how very difficult this can be for teens (especially girls). Ask your daughter not to put herself down. Being negative makes being healthy hard. If she has concerns with her appearance, tell her to be specific. Does she feel she is not athletic enough to do well at sports ? Does she feel she lacks energy to do things she enjoys ? If she can site specific reasons why she feels unhappy with her body, then she can more easily make a plan to change the things she actually needs to change (eating, exercise, etc.) And I'll say it again, because it's worth repeating - lead by example - don't let her hear YOU putting yourself down !

I would say around 130 pounds, because that is the average weight of a full grown woman and 5'4'' is the average height of a full grown woman.