I was a bit hesitant about buying this top as there had been some complaints regarding the tightness of the arms. However, I really wanted a lightweight top. I was drawn to this one based on its rounded bottom shape, longer at the back. I contemplated going up a size to accommodate the arms, but then opted for my regular xs. I was not disappointed with the product. The upper arms were a little tight at first, but that issue seems to have disappeared. This sweater has become my go-to: not bulky so perfect for layering.