Richie House Girl's Solid Sundress with Belt At Waist Size 2-12 RH1921 100%polyester Lining:100%cotton A size 2/3 is for the average 2-3 year old girl, a size 5/6 is for the average 5-6 year old girl, a size 9/10 is for the average 9-10 year old,ect Back zipper closure,waist pleat details,as adorable essentional summer dress for party or everyday wear,Cotton lining fabric,comfortable and wearable for summer SIZES FOR LITTLE AND BIG KIDS ARE BOTH AVAILABLE, PLEASE CHECK THE OTHER LISTING IN THE OTHER SIZE RANGE