How tall are your 6 year old daughters? The reason I ask this question is because during the past couple of weeks, i've noticed stretch marks on the upper thighs of my daughter -she's almost 6 yrs old. Not overweight, but very tall for her age. Currently 124.5cm. I'm 6 feet tall, and her brother is very tall, and has a couple of stretch marks on his lower back (not overweight in the slightest). Should I be concerned about the stretch marks? How do I make them stop? Even though she's not overweight, should I cut back on meals for her, even though I think the stretch marks are a result of her growing in height? Would that help? She's a size 9-10 in clothing largely because of height. I had stretch marks growing up, but mainly because of weight. I want to spare her from going through the embarrassment of not being able to wear what she wants because of stretch marks.