My son wears normal Hanna Andersson clothes in size 130 (8) but based on other reviews I chose a size under 10 for her. He is of average height and weight (60 lbs), slim but not skinny. My son's waist was loose but his legs were tight. I think the length was accurate for a size 10. I think the legs will loosen up with wear but we'll have to wait for the waist to sit comfortably on it and not slide down. We were pleased with the quality - they are soft (even before the first wash) and a nice cotton density.
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