I purchased this new on Mercari and wore it about twice. The size is S, but I think it's a bit large. I recommend it for those who usually wear size M. It's smooth, so I think you can wear it comfortably even in the scorching heat of midsummer. I don't think there are any noticeable stains, but please refrain from purchasing if you are very particular. I have lowered the price as much as possible, so I will fold it up small when shipping.