Richie House Girls' Party Dress with Layered Mesh Covered Size 3-8Y RH2615 100%polyester Lining:100%polyester A size 5 is for the average 4-5 year old kid,a size 6 is for the average 5-6 year old kid,a size 8 is for the average 7-8 year old kid,ect For a day spent outdoors or an afternoon with pals, this dress is great for little sweeties. Little ladies will be the belle of the ball donning this darling dress.