I purchased this on Rakuten Ichiba. I only tried it on over my clothes, but it didn't fit, so I'm selling it. It is unused. It is size m9. My daughter, who is 140 cm tall and weighs 45 kg, tried it on and it fit her perfectly, so I think it would be just right for someone around 35-40 kg. I think it might also fit women who are slender in the shoulders and waist. This has been stored at home, so please refrain from purchasing if you are concerned about minor details. I plan to ship it via Yu-Packet Post Mini or Yu-Packet Post. Thank you.