Worn a few times. Size O (likely Japanese size). It's light and thin, so you can fold it up small and put it in your bag. The fabric is smooth, so I think it's unlikely to wrinkle. Measured flat: armpit to armpit width is about 52cm. The length is slightly longer in the back. Please check the 11th photo. I don't see any noticeable stains, but please understand that I am a private seller, so if you are concerned about the details, please be aware of this. No price reduction is possible.