Richie House Girls' Happy Patterned Cats Dress RH0203 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 8 is for the average 7-8 year old, etc. Happy patterned cats Very cute color and style for young girls,fashion and leading the trends