Your daughter's gonna be a big girl. I can't tell you what to do to make it easier on her (except perhaps to continue encouraging her to play hockey, where size is a plus) because it's perfidious. When I was in college, I was 5'11" and 165lbs and I was surrounded by little bits of things. I wore a size 12 and thought I was huge because all the other girls were size 8. No raiding my roomate's closet for me. I wish there had been some way for me to know that I was just right. I sure wouldn't mind weighing that now! LOL!
Elizabeth