I am selling this item as part of a decluttering effort. The tag says M, but it's closer to a small M, so I recommend it for those who usually wear a size S. If you wear a size M, it will be a very tight fit, but it's still wearable. However, it will show your body lines quite a bit. This is a used item, so please purchase only if you understand this. Please refrain from purchasing if you are concerned about the details. Color: Gray