Imo this dress is true to size, I'm 5'1, 125 usually between a S-M and I got the small. There isn't a lot of stretch & it's a tight fit but that's how it's supposed to be. Super flattering, smoothed me out without any shapewear, I love the underwire in the breast for a lift, and I can still move in it as I please lol. If you don't want as tight of a fit size up, but if you want it to fit the way it fits the model in the pictures, get your true size 🔥