Richie House Big Girls' Medium Knit T-Shirt with Girl Size 6-14Y RH2474 95% Cotton, 5% Spandex A size 6 is for the average, 5-6 year old girl, a size 8 is for the average 7-8 year old girl, a size 10 is for the average 9-10 year old, etc. Soft and comfortable, addition of spandex makes for a unique texture and drapes softly against the body for a comfortable fit and feel Medium T-shirt style, SIZES FOR LITTLE AND BIG KIDS ARE BOTH AVAILABLE, PLEASE CHECK THE OTHER LISTING IN THE OTHER SIZE RANGE