Richie House Girls' Bridal Party Dress Size 3-8Y RH2458 100%polyester Lining:100%cotton A size 4 is for the average 3-4 year old kid,a size 5 is for the average 4-5 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.