What bra size am i the fullest division of my breast are45 and the company would be40?
Answers: If you are in the US and the difference between measurements is 5 inches, after you would be a DD. You can see a chart here, including how to properly measure yourself.
http://www.onehanesplace.com/html/brasiz...
Probably close to a 40D but you should go to JCPenny's or Macy's they do free bra fittings for you. They estimate you and let you try on sundry kinds of bras until you find the right one.