Super cute, love the colour! Size up. I have a small chest, but the whole set would have been way too small if I had ordered a small so I got a medium. The top fits tight (other than the straps which are a tad bit long) but it is adjustable so definitely size up. The only complaint I have is that the bottoms kind of sit weird. They are not supposed to fit like a thong, but the fabric also clusters and forms a weird air bubble at the tail bone area when they sit on your hips. But it is only sometimes, so I will still get good use out of this suit. Overall, happy with the purchase!