It runs small and I think the sizing listed is incorrect. Although my daughter is a little taller than most of the kids her age (she was 6 when she wore this), she's on the leaner side and the 7/8 size was snug on her. When she wears jeans or leggings in the 7/8 size for various manufacturers, the waist is often too large (even adjusted with jeans). This is just snug, too bad as she picked this out for herself.