I just bought my daughter Lululemon leggings on vinted. Her friends said they wear size 0 so that's what we ordered. The waistband is the same size as my three year olds age 3-4 leggings. They are tiny and far too small. My daughter is age 10 - a bit taller than average but slim. The school doesn't have a school uniform and most of the girls in her class are now wearing Lululemon leggings. I don't really want to bring her into the shop to try anything on because I just want to get them second hand on vinted. I really dislike that most of the girls are wearing them but I know she feels miserable and different without them. I don't wear them myself so don't know about the sizing. Does anyone have any suggestions?