The bikini is amazing and I love it! It is soooo glittery and glamorous, my picture is not showing how glittery it is when the light hits it. I am normally a size medium/size US 6 bottom but sized down to extra small to avoid the fabric looking like a diaper. Yes, I downsized 2 sizes. The sides are tie on so it is fine to adjust to your waist size. I am normally size small top and went down 1 size to extra small.