This top! i was hesitant to try this on because it felt too busy, however it is a must have. it's just the right amount of lace and detail. i am typically an m in retailer tops (sometimes l depending on the designer; i'm a 32/34ddd). i initially tried a l in this thinking it had no stretch but ended up going with the medium. the arms were a tad tight but stretched slightly after an hour of wear and it fits perfectly everywhere. i think if you size up it will be too "blousy." highly recommend this-