Watch the reflections in the mirrors. Change your distance to the mirrors and your body position.
How it works
The surface of the mirrors is not flat but bent at a certain angle. As a result, you get a distorted reflection.
Slimming mirrors are used in some clothes shops. This is done to boost sales by giving an impression that the clothes make the customers look slimmer. The curvature of the mirror surface is very slight so it is barely noticeable. You should keep it in mind when you go shopping.