Juniors Rainbow Tie Dye Heart Twist Back Tank Juniors tie dye tank top Rainbow tie dye with heart design twist back detail 100% polyester Women's slim/junior/teen sizing. Small: 17" flat across chest, 22" long. Medium: 18" flat across chest, 22" long. Large: 19" flat across chest, 23" long. X-Large: 20" flat across chest, 23" long. 2X-Large: 21" flat across chest, 24" long.