I am between a medium and large at Old Navy and don't like things tight. I am 5'3", 135/140ish. I ordered a large tall because I did not want it too short and panicked a bit when it was first delivered because it kind of looked like the tall made it a lower drop waist rather than longer. I tried it ...on, however, and it turns out it is perfect. The drop waist hits at a really perfect pooch hiding spot. The length is good. The top is loose enough to be comfortable (I think I'm like a D or DD cup?) without gaping arm holes. I like that I can wear this in many ways, like putting a polo or button down under it, or putting a blouse or sweater on top of it. Now I'm considering the other colors! Oh, and I think this could be flattering for many different ages. I'm in my 40s but I think older or younger would work too!