The size is M. I bought this for scuba diving. I've used it twice, and it's clean and in good condition. It has been cleaned. I probably won't be diving anymore, so I'm selling it. The product description is as follows: Unisex black innerwear, with a half-zip design and pants with an elastic waistband. - Color: Black - Gender: Unisex - Pants design: Elastic waistband - Top design: Half-zip - Logo: Red logo Thank you for looking.