This top runs both small and true to size
This top has a lot of potential (comfortable, easy to wear) but it's cut too small in the area above the bust. i tried the top in small, medium and large (i usually wear s or m in retailer tops) and couldn't get that area to not look tight or like it was pulling. you can see it on the model, too -- that space right above the bra near the armhole. i think you'd need to order a size up to get that space to work but then the top will start to look too big on the bottom. 
i tried the green in the sto