[BonitaDDs]

That's about a 28d/dd or 30c/d You shouldn't go bigger than a 30 in the band if you can, that sounds much more how you look than 34b.
Look other 28dds
http://www.brabandproject.com/gallery/search?band=28&cup=DD&age=&brand=&sister_sizes=0&search=Search
30ds
http://www.brabandproject.com/gallery/search?band=30&cup=D&age=&brand=&sister_sizes=0&search=Search
34 band just to compare these girls look mostly much bigger build than you
http://www.brabandproject.com/gallery/search?band=34&cup=&age=&brand=&sister_sizes=0&search=Search