I bought this last year and wore it once. The waist is elastic and stretchy, but it felt too big on me, so I'm selling it. Please understand that I have washed it and stored it at home after wearing it only once. Please also understand that there may be some wrinkles from being stored in the closet. Size: M (I've included a photo with a measuring tape on the waist when laid flat) Please feel free to ask any questions. Shipping will be in simple packaging via Rakuraku Mercari Delivery. #Sportswear #Trainingwear