Just know that you need shorts, not briefs with this. Runs small, really itchy and short. Sequins fall off, like all sequin stuff from natalie. REALLY short. Adult is the same. We bought to use for 3 performances, trashed after the 3rd one. Very sparkly though! Much more affordable than stoning a dress. Just more a tunic than a dress.
My daughter's measurements match a Child Intermediate measurements. I heard they ran small so I ordered a Child Medium just to be on the safe side. When it arrived, I thought they must have sent me the Child Small instead. I checked the tag and discovered that they did send me the child medium that I ordered. The Child Medium chest is about 11" across unstretched and about 13" across fully stretched. The Child Medium waist is about 10" across unstretched and about 12" across fully stretched. The Child Medium length is about 20.5" from the seam on the top of the shoulder to the bottom of the dress. I ended up ordering her a Child Large and that is a very short dress. We ended up buying the silver booty shorts to go underneath. I hope this helps!