This was my first time ordering a piece of men's shapewear! I initially ordered the size XL for myself, as my weight flcutuates and my waist size varied between large and extra large, so I assumed XL would be better. When I got the product, however, it was a little bit large on me. My father, however, has been looking for a product like this for a while, so I gave it to him, and it fit him perfectly! He was very comfortable to sit in it, and it was hidden very well beneath his clothes, but also helped with his posture and in shaping his back, which he loved! The steel-bone design was perfect, as well, and very easy to put on! I very much intend to buy a smaller size for myself at some point, too, as this product seems very nice to use. Highly recommended!