I am large chested and this works perfect! Pre pregnancy was 160lb 5'5'' 34 DD/DDD, during pregnancy i went up to a 40 DD/DDD and 198lb (probably larger but i refused to buy another bra towards the end), went down to a 38 DD and 167lbs immediately postpartum. This fit great and is adjustable. I bought it on the larger side in case my weight and chest got bigger after my milk came in, however i got smaller and this still fits great. Its very comfortable to wear. Ive only tried using it for pumping, havnt tried pumping and breast feeding at the same time with it.