Take into account that Our Colombian Bodyshapers already come compress, There are two ways to Know your Size:
Size of your blouse:
If you want balance compression, order your normal blouse size, for example, if you are M, order an M.
If you want higher compression then you should order one size down, for example, if you are M, you will order an S.
If you have your waist and hip measurements you can compare our size charts in each Faja and see what size you are if you are between two sizes, select the bigger one.
The truth is that most of us do not know our measurements so the first option is more common.