Disney Tank Top-licensed Disney Juniors Mickey Vintage Stars-Junior Sizing 50% Polyester / 38% Cotton / 12% Rayon Machine wash, tumble dry Officially Licensed Disney Merchandise featuring Mickey Mouse Star print Opaque screen design; Soft and comfortable Junior/Teenage Sizing - runs smaller/slimmer than regular women's sizing Underarm to underarm measurements: Small=17", Medium=18", Large=19" and X-Large=20" Length: Small=21", Medium= 22", Large=23" and X-Large=24"