Listen, you need to kepe persisting that she is perfect the way she is, peer pressure always make people feel different about themselfs! I am the same height ans weight, if she goes down to 120 she will be very underweight which is dangerous! I am 5'8 and 143 pounds and I wear a size 9. She is perfect the way she is, I just do a 10 min excercize every night to tone my body. If you would like to chat more or have her chat with someone she same "body size" maybe I can help! Tell her to keep her head up! here is my e-mail: WhirlGirl101@Yahoo.com