Disney Juniors Mickey Mouse Allover Print Bra Top Disney juniors cotton stretch active wear bra top features all over Mickey Mouse print Racerback bra with elastic bottom band 95% cotton 5% spandex blend. Officially licensed. Junior sizing, runs smaller than regular women's sizing. Flat measurements. Small: 13" across underarms, 12" across band. Medium: 14" across underarms, 13" across band. Large: 15.5" across underarms, 14.5" across band. X-Large: 18" across underarms, 16.5" across band.