I have pretty large breasts on a short but thick frame. My boyfriend wanted to start jogging and with all my regular bras it killed me all I could feel was my chest being yanked down everytime and it kills your stamina. After googling alot of good sports bras for large chests I figured I would try she fits sizing is pretty accurate I'm about a 39 dd so I got a 2x and it fits great plus you can adjust the shoulder straps and chest straps. Jogging is much easier now. Always a challenge with larger breasts but definitely easier to breathe and keep stamina