These are a size womens medium my waist size usually for retail is 8-10 the straps on the top of the trousers you can tighten and loosen you have room to have multiple layers. The feet of the bottom are a benefit.

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These trouser I have only worn a few times. The reason I purchased them was when I was being qualifed as Outdoor Instructor, part of the course was learning paddle skills they are brilliant at keeping you warm our training varied for the year and you can really tell in winter the difference they make. The feet on the bottom are espically brilliant as it stop the water coming in if you fall in.