The mirror that sells clothes can be slim as long as it is tilted a little or raised a little. This is the trick of adjustment. The flat mirror image is the same size as the real thing, and the concave mirror image will be slightly smaller than myself. Most mirrors in clothing stores are concave mirror, but the effect of "slimming" will not be exaggerated because of the tiny radian.

In some shops, the angle of the mirror can be adjusted. According to the principle of light reflection and refraction, the proportion of the lower body increases obviously after the mirror is tilted, and the portrait leaning back lengthens the vertical viewing angle.

The size and shape of the mirror are also very particular. Narrow and long mirrors have better slimming effect. In addition, clothing stores often use a three-layer mercury mirror, which reflects much more light than a mirror plated with mercury, so that the outline of the portrait will be more distinct, the color will be brighter and saturated, and most clothing stores have soft lighting, which can make the skin color look even and bright.

If space permits, the store must choose a mirror with an independent frame, with a length of more than two meters and a width of 50 to 70. When placed obliquely, it can lengthen the visual effect of the body and make people in the mirror look better.