If you came onto this post expecting me to tell you where to buy the best waist trainer, the you are going to be surprised when I tell you that in no way do I support waist trainers.

They are bad for your body. If you are of a healthy weight/size then the shape of your waist now, is how it naturally is and there is no changing it.

Don't worry, this isn't a pointless post. I'm going to show you how you can make your waist appear smaller.
 

The glutes / gluteal muscles are made up from gluteus maximus, which is not only the largest of the gluteal muscles, but the largest muscle in the human body, gluteus medius and gluteus minimus (smallest of the gluteal muscles).

I've found that a lot of people find it hard to feel an exercise that is aimed at their glutes, whether it be an isolated or compound exercise.

Hopefully after reading this post you will no longer have this issue.