Thank you for viewing. The size is ML. I am 174cm/68kg and it fits without any problems, and I can use it without any discomfort. It's non-zippered with a front closure, so it was comfortable without any tightness or discomfort on my back! I'm selling it because I don't go to the sea as often anymore. There are noticeable wrinkles, but since I haven't worn it recently, I think the wrinkles will stretch out as you wear it. It's still usable, so please consider it. It's used, so please understand this before purchasing. No returns. If there are any areas you're concerned about, I'll take close-up photos.