Vintage Button Corset Detail Mini Dress size M

Summer listing alert! 90% of the time I’m size M or 4-6. I would say this dress is size M to S. Please note lately I workout my back and found the top part of the dress is kind of small (before when I didn’t workout, it totally fit me). Partially because of the design is fitted and really emphasis the hourglass shape. Measurements are on pic 2-4 ;)