I was iffy on ordering between a S or M and ended up going with a S in the rust color. My bust is 33.5in w/28in waist and it fit perfect. It is a wrap style so you can control how tight/loose you want it to fit. But if you want a slightly looser fit, I'd recommend to size up. The sweetheart neckline, sleeves, and peplum give it a dainty cute look. I definitely recommend this top; it is perfect for Fall!